Pipe flaring device

Abstract

The utility model discloses a pipe flaring device, which is characterized in that a flaring component is detachably connected with a moving rod in an inserting manner, an operating piece and a stopping piece are arranged, and the stopping piece can be quickly switched between a stopping state and a non-stopping state by operating the operating piece. The stop piece in the stop state keeps stable connection of the flaring component and the moving rod after insertion connection, the flaring component is prevented from being separated from the moving rod, the stop piece loses the stop effect through the operating piece and is in the non-stop state, and the flaring component can be freely separated from the moving rod so as to be disassembled, so that flaring components of other sizes can be replaced. According to the pipe flaring device, the flaring component and the moving rod do not need to be in threaded fit, axial fixing of the flaring component and the moving rod can be achieved only in an inserting and locking mode, locking of the flaring component and the moving rod can be achieved through quick contact of the operating piece, dismounting and mounting are convenient, time and labor are saved, and working efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe expansion, in particular to a pipe expansion device. Background Art

[0002] Prior art patent JP3182690B2 discloses a clamp for press-fitting a sleeve-shaped inner ring to one end of a resin tube, wherein the clamp engages and holds the inner ring 23 on the ring holding shaft portion 20a of the ring holder 20, holds and fixes one end of the resin tube member 14 on the clamping portion 2, and then holds the handle 21, and the feed screw 19 rotates and advances; the inner ring 23 is pressed into one end of the resin tube 14 by the advancement of the feed screw 19; at this time, since the annular bracket 20 can rotate freely at the front end of the feed screw 19, the inner ring 23 on the annular bracket 20 moves linearly without being affected by the rotation of the feed screw 19, and then, as shown in the patent Figure 7 As shown, when the front end of the interlocking portion 46 of the inner ring 23 is pressed into the specified depth at which the end of one end of the resin pipe 14 abuts against the end, the rotation of the feed screw 19 stops and the press fit is completed; after the press-in is completed, the feed screw 19 is rotated in the opposite direction and returned to its original position to pull the annular bracket 20 out of the inner ring 23 pressed into one end of the resin pipe 14.

[0003] In the above-mentioned prior art, the annular bracket 20 includes an annular retaining shaft portion 20a having an axial ring capable of inserting and retaining the inner ring 23, and a connecting shaft portion 20b connected to the rear end of the annular retaining shaft portion 20a, and the annular bracket 20 is connected to the front end of the feed screw 19 so that it can rotate freely; the specific connection method is that the connecting shaft portion 20b of the existing annular bracket 20 passes through the cylindrical portion 24 of the retaining block 26 and is restricted by washers 27 and 28, and then is connected by the external thread 24a of the cylindrical portion 24 of the retaining block 26 and the internal thread 29a of the screw 19, so the disassembly and assembly of the annular bracket 20 and the screw 19 depends on the threaded fit of the external thread 24a and the internal thread 29a.

[0004] However, when the above-mentioned clamp is actually used, since different types / sizes of the annular bracket 20 can be adapted to expand pipes of different models / sizes, when facing pipes of different models / sizes, whether the pipe is directly expanded or the inner ring is pressed into one end of the pipe, the annular bracket 20 needs to be disassembled and replaced. However, the annular bracket 20 is threadedly connected to the screw 19, and installation and disassembly are time-consuming and reduce work efficiency, especially when the annular bracket 20 needs to be frequently disassembled and assembled, which makes it inconvenient for the staff to operate.

[0005] Therefore, it is necessary to design a pipe expansion device to improve the efficiency of installation and disassembly. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pipe expanding device, which solves the problem that the existing pipe expanding device is troublesome in installing and disassembling the expanding parts when dealing with pipes of different models.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A pipe expansion device, comprising a main body, a moving rod and a clamping component arranged on the main body, wherein the clamping component is used to clamp the pipe;

[0009] The front end of the moving rod is plugged with a flaring component, and the moving rod can move relative to the clamping component to insert or withdraw the flaring component into or out of the pipe;

[0010] The expansion component has a first locking portion, and the moving rod has a second locking portion;

[0011] The expansion device further comprises an operating member and a stop member, wherein the operating member is movably connected to the front end of the moving rod or the expansion member, and the operating member is operated so that the stop member has a stopping state and a non-stopping state;

[0012] When the stopper is in a stopping state, the operating member causes the stopper to engage with the first clamping portion and the second clamping portion at the same time, and the stopper blocks the separation movement of the flaring component and the moving rod;

[0013] When the stopper is in a non-stopping state, the stopper can be disengaged from at least one of the first locking portion and the second locking portion, and the flaring component can be separated from the moving rod.

[0014] The pipe expanding device provided by the utility model connects the expanding component and the moving rod in a detachable manner by plugging, and also provides an operating member and a stop member. The operating member enables the stop member to quickly switch between the stop state and the non-stop state. The stop member in the stop state maintains a stable connection between the expanding component and the moving rod after plugging, thereby preventing the expanding component from being separated from the moving rod. The stop member loses its stopping function and is in a non-stop state through the operating member, so that the expanding component can be freely separated from the moving rod and disassembled to replace expanding components of other sizes. In summary, the pipe expanding device described above does not require threaded cooperation between the expanding component and the moving rod, and the fixation of the two can be achieved only by plugging and locking. The lock between the two can also be quickly released by the operating member, which is convenient for disassembly and installation, saves time and effort, and is conducive to improving work efficiency.

[0015] Specifically, the stopping state of the stopper refers to that the stopper is simultaneously engaged with the first engaging portion on the flaring component and the second engaging portion on the moving rod, and at the same time, the operating member can prevent the stopper from being disengaged from either the first engaging portion or the second engaging portion. As a result, the flaring component and the moving rod are locked by the stopper in the plug-in state, and the flaring component can be stably inserted at the front end of the moving rod, so that under the moving action of the moving rod, the flaring component can be inserted or withdrawn from the tube to expand the tube; the non-stop state of the stopper refers to that the stopper can be disengaged from the first engaging portion or the second engaging portion or can be separated from the first engaging portion and the second engaging portion at the same time, so that the stopper no longer plays a stopping role in the separation between the flaring component and the moving rod, and the flaring component can leave the moving rod in the opposite direction of the plug-in direction.

[0016] The function of the operating member is: operating / controlling the operating member so that the stopper is kept in the stop state, or operating / controlling the operating member so that the stopper no longer has the stop function, so as to switch the stopper from the stop state to the non-stop state. The operating member can keep the stopper in the stop state in the form that the operating member limits the activity space of the stopper to be very small or substantially nonexistent, the stopper is limited to the stop position where it is simultaneously engaged with the first engaging portion and the second engaging portion, and the separation movement of the flaring member is blocked by the stopper and cannot be separated. The operating member switches the stopper to the non-stop state in the following manner: due to the movement of the operating member, the movable space of the stopper increases, so the first clamping portion and the second clamping portion can be relatively moved, and the operating member cannot make the stopper engage with the first clamping portion and the second clamping portion at the same time. The stopper can move a certain distance relative to the first clamping portion and the second clamping portion, so that the stopper is disengaged from at least one of the first clamping portion and the second clamping portion, and the stopper no longer blocks the separation movement of the flaring component, so that the flaring component and the moving rod are disassembled. In summary, the stopper can be switched between the stopper and the non-stopper state by simply operating the operating member, so that the flaring component and the moving rod can be separated and fixed, saving time and effort.

[0017] Preferably, the expansion component comprises a mounting frame, and the first clamping portion is a groove arranged on the outer peripheral wall of the mounting frame;

[0018] The front end of the moving rod has a receiving cavity for receiving at least a part of the mounting bracket;

[0019] The second locking portion is a through hole provided on the side wall of the accommodating cavity, and the through hole is communicated with the accommodating cavity;

[0020] The operating member has an operating surface disposed toward the through hole, the stopper is movably disposed in the through hole, and the operating surface can contact the stopper;

[0021] The operating surface can drive the stopper to move radially in the through hole, so that the stopper partially enters the accommodating cavity and engages with the groove to form the stop state or disengages from the groove to form the non-stop state.

[0022] With such a configuration, the control switching of the two states of the stopper can be easily realized through the operating surface, the operation is convenient, and the structure is simple and reliable. The operating surface of the operating member can limit the radial activity space of the stopper, so that the stopper is radially engaged in the through hole and the groove at the same time, thereby forming an axial limit fixation for the mounting frame and the moving rod, and the mounting frame and the front end of the moving rod are locked and cannot move relative to each other in the axial direction, so that the flaring component moves synchronously with the moving rod in the axial direction. The operating member is controlled so that its operating surface is axially away from the stopper or radially away from the stopper, so that the radial activity space of the stopper becomes larger and it can be radially away from the groove under its own gravity or external force. After the stopper is separated from the engagement with the groove, the stopper no longer realizes axial limit on the mounting frame and the moving rod, and the mounting frame can be pulled out of the receiving groove at the front end of the moving rod.

[0023] Preferably, the operating member is a sleeve, which is movably sleeved on the front end of the moving rod and can move in the axial direction;

[0024] The operating surface is a conical surface of the inner wall of the sleeve corresponding to the position of the through hole, so that the inside of the sleeve has a large diameter end and a small diameter end arranged along the axial direction;

[0025] When the sleeve moves axially in the first direction so that the stopper is in a non-stop state, the stopper approaches the large-diameter end, and the flaring component moves axially so that the stopper can exit the groove;

[0026] When the sleeve moves axially in a second direction opposite to the first direction so that the stopper is in a stopping state, the stopper is close to the small diameter end, and the stopper is partially engaged in the groove to limit the axial movement of the flaring component.

[0027] In this arrangement, the sleeve serves as an operating member, and is axially movably sleeved on the front end of the moving rod. The conical surface arranged on the inner side thereof is an operating surface. The conical surface has a large diameter end and a small diameter end arranged axially. When the sleeve moves axially, when the stopper is close to the large diameter end, the stopper has a larger space for radially moving outward, so that the stopper can exit the groove and be in a non-stop state. When the stopper is close to the small diameter end, the stopper has a very small space for radially moving outward or basically no space. Therefore, the stopper is always simultaneously engaged with the through hole and the groove and is in a stop state, thereby realizing axial limitation of the flaring component and the moving rod. On the one hand, the movement of the sleeve can more conveniently move the operating surface therein axially, so that the large diameter end and the small diameter end of the operating surface can quickly move to the radial outside of the stopper or leave the radial outside of the stopper, thereby realizing the switching of the stopper between the stop state and the non-stop state, thereby making it easier and more labor-saving to disassemble and assemble the flaring component from the moving rod; on the other hand, by designing the dimensions of the large diameter end and the small diameter end of the conical surface, the radial movement distance of the stopper can be more stably controlled, ensuring that the stopper can stably switch between the stop state and the non-stop state.

[0028] Preferably, the moving rod comprises a rod body and a support member fixed to the front end of the rod body, and the accommodating cavity is opened on the end surface of the support member;

[0029] An elastic component is sleeved on the outer periphery of the support component, one end of the elastic component elastically presses against the rod body, and the other end of the elastic component elastically presses against the operating component.

[0030] In this arrangement, in order to facilitate the installation of the sleeve and the elastic component, the rod body and the support member are fixed in a split manner, which is also convenient for processing the accommodating cavity on the support member, and the overall cost is lower. The role of the elastic component is: when an external force is applied to the sleeve, it drives the operating surface to put the stopper in a non-stop state. After the expansion component is removed and the external force applied to the sleeve is removed, the sleeve can automatically and quickly reset under the action of the elastic component, so that the stopper switches to the stop state without additional operation, which is more convenient and labor-saving.

[0031] Preferably, the inner wall of the sleeve is provided with an annular flange, and the annular flange is located at the axial rear side of the conical surface;

[0032] The annular flange has a sleeve on its axial rear side. The sleeve is movably sleeved on the outer periphery of the support member. The elastic component is arranged between the sleeve and the rod body.

[0033] With such a configuration, the sleeve is arranged on the outer periphery of the support member through the shaft sleeve, and contacts the support member through the inner side of the shaft sleeve. The contact area is smaller and the friction force is smaller, so that the axial movement between the sleeve and the support member is smoother; the annular flange on the inner wall of the sleeve serves to position the shaft sleeve to prevent the shaft sleeve from moving relative to the sleeve. When the sleeve moves axially, the annular flange pushes the shaft sleeve to move axially.

[0034] Preferably, the inner wall of the sleeve is provided with a first annular accommodating groove on the axial rear side of the annular flange, a clamping ring is arranged in the first annular accommodating groove, the clamping ring is movably sleeved on the outer periphery of the support member, the clamping ring is located between the elastic component and the sleeve, and a first step surface is formed on the inner wall of the sleeve, and the clamping ring can abut against the first step surface to limit the movement of the clamping ring in a direction away from the rod body.

[0035] With such arrangement, the function of the retaining ring is to protect the sleeve from being directly squeezed by the elastic component; the function of the first annular accommodating groove is: on the one hand, for accommodating and installing the retaining ring, the first annular accommodating groove forms a first step surface at the end axially close to the sleeve, a part of the retaining ring abuts against the end face of the sleeve, and the other part abuts against the first step surface, and at the same time, the retaining ring is axially limited in the first annular accommodating groove by the spring component; on the other hand, the first annular accommodating groove can also accommodate part of the elastic component, play a role of axially limiting the elastic component, and push the retaining ring to squeeze the elastic component when the sleeve moves axially.

[0036] Preferably, a second annular accommodating groove is provided on the inner wall of the sleeve at the axial rear side of the first annular accommodating groove, the second annular accommodating groove extends axially from the rear end of the sleeve and is connected with the first annular accommodating groove, the end portion of the rod body extends into the second annular accommodating groove, and a second step surface is formed on the inner wall of the sleeve, and the second step surface can abut against the rod body to limit the movement of the sleeve toward the rod body.

[0037] With such a configuration, the second annular accommodating groove can accommodate part of the end of the rod body and guide the axial movement of the sleeve, thereby preventing the sleeve from tilting or getting stuck with the end of the rod body when it moves axially relative to the rod body. The second annular accommodating groove forms a second step surface at the end axially close to the first annular accommodating groove. The distance from the second step surface to the end of the rod body is the movement stroke of the sleeve that can axially approach the rod body. Therefore, the axial movement distance of the sleeve can be limited, thereby preventing the sleeve from moving too far in the direction of the rod body, and preventing the through hole and the stop member from being out of the coverage of the conical surface of the sleeve, resulting in the stop member being completely disengaged from the through hole.

[0038] Preferably, the outer periphery of the end of the support member facing the flaring component has a blocking portion, and the outer diameter of the blocking portion is not less than the maximum circumferential diameter of the through hole at the corresponding position on the side wall of the support member.

[0039] With such arrangement, when the small diameter end of the conical surface of the sleeve is opposite to the stopper, the blocking portion is located in the opening of the sleeve, and when the sleeve is moved axially close to the rod body, the large diameter end of the conical surface of the sleeve is opposite to the stopper, the blocking portion is exposed at the opening of the sleeve, and the stopper is also close to the opening of the sleeve. Since the outer diameter of the blocking portion is larger, the axial moving path of the stopper is blocked. At the same time, the conical surface of the sleeve blocks the radial moving path of the stopper, and the two cooperate to prevent the stopper from completely detaching from the through hole.

[0040] Preferably, the stopper is a sphere movably disposed in the through hole, the groove is an annular groove, and the shape of the annular groove matches the sphere, so that when the sphere is engaged with the annular groove to form the stop state, the mounting frame can rotate relative to the sphere.

[0041] The advantage of such an arrangement in which the groove is an annular groove is that the mounting frame can be inserted axially into the accommodating cavity. The annular groove enables the sphere in the through hole to be snapped into the annular groove to form a stop state regardless of the angle of the mounting frame, thereby realizing the installation of the flared component regardless of the angle, which is more convenient to use.

[0042] Preferably, the moving rod is a screw rod, and the expanding component further includes a retaining frame rotatably connected to the mounting frame and an expanding member disposed on the retaining frame.

[0043] With such arrangement, when the tube is expanded, the movable rod is rotated to make it move axially to drive the expansion piece to rotate. In order to prevent the expansion piece from causing friction to the inner wall of the tube due to the expansion piece following the rotation of the movable rod after the expansion piece is inserted into the tube, the expansion piece is arranged on a retaining frame rotatably connected to the mounting frame so that the expansion piece and the movable rod can rotate relative to each other. As a result, the rotation of the movable rod will not affect the expansion piece, and the axial movement will be transmitted to the expansion piece to protect the tube.

[0044] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0045] The pipe expanding device of the embodiment of the utility model connects the expanding component and the moving rod in a plug-in detachable manner, and also provides an operating member and a stop member. The operating member enables the stop member to quickly switch between the stop state and the non-stop state. The stop member in the stop state maintains a stable connection between the expanding component and the moving rod after plugging in, avoiding separation of the expanding component from the moving rod. The stop member loses its stopping function and is in a non-stop state through the operating member, so that the expanding component can be freely separated from the moving rod and disassembled to replace expanding components of other sizes. In summary, the pipe expanding device described above does not require threaded cooperation between the expanding component and the moving rod, and the fixation of the two can be achieved only by plugging and locking. The lock between the two can also be quickly released by the operating member, which is convenient for disassembly and installation, saving time and effort, and helping to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 The utility model is a schematic structural diagram of a pipe expanding device according to an embodiment of the utility model.

[0048] Figure 2 for Figure 1 A cross-sectional schematic diagram of the pipe expanding device of the embodiment in the figure, wherein the stopper is in a stopping state.

[0049] Figure 3 for Figure 2 Enlarged view of point A in .

[0050] Figure 4 for Figure 1 A cross-sectional schematic diagram of the pipe expanding device of the embodiment in which the stopper is in a non-stop state.

[0051] Figure 5 for Figure 4 Enlarged view of point B in .

[0052] Figure 6 for Figure 1 Schematic diagram of the main body and the moving rod of the embodiment.

[0053] Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure of the flaring component.

[0054] Figure 8 for Figure 7Schematic cross-section diagram of .

[0055] Fig. 9 It is a cross-sectional schematic diagram of a widening device according to another embodiment of the utility model, in which the stopper is in a stopping state.

[0056] Fig.10 This is a cross-sectional schematic diagram of a widening device according to another embodiment of the utility model, in which the stopper is in a non-stopping state.

[0057] Fig.11 It is a cross-sectional schematic diagram of a widening device according to another embodiment of the utility model, in which the stopper is in a stopping state.

[0058] Fig.12 This is a cross-sectional schematic diagram of a widening device according to another embodiment of the utility model, in which the stopper is in a non-stopping state.

[0059] Description of Reference Numerals

[0060] 1. Main body; 11. Base; 12. Protrusion; 121. Threaded hole; 2. Moving rod; 21. Support member; 211. Accommodating cavity; 212. Through hole; 213. Blocking part; 22. Rod body; 23. Elastic member; 3. Clamping member; 31. Clamping body; 311. Mounting groove; 32. Pipe clamp; 33. First positioning member; 34. Second positioning member; 4. Expanding member; 41. Mounting frame; 411. Groove; 412. Center hole; 42. Retaining frame; 421. Retaining shaft; 422, retaining cylinder; 423, first gasket; 424, second gasket; 43, flaring member; 6, operating member; 61, sleeve; 611, conical surface; 612, large diameter end; 613, small diameter end; 614, annular flange; 615, first annular receiving groove; 616, first step surface; 617, second annular receiving groove; 618, second step surface; 62, clamp; 63, button; 64, operating surface; 65, sleeve; 66, clamp ring; 7, stopper. DETAILED DESCRIPTION

[0061] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0062] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0063] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] As attached Figure 1 As shown, the embodiment of the utility model discloses a pipe expansion device, comprising a main body 1, a moving rod 2 and a clamping component 3 arranged on the main body 1, the main body 1 is used as a mounting platform, the moving rod 2 is arranged along the axial direction of the main body 1, and the axial direction of the moving rod 2 and the axial direction of the main body 1 are both referred to as Figure 4 The horizontal direction in the embodiment of the utility model refers to the radial direction of the circular moving rod 2. The clamping part 3 is used to clamp the pipe. The moving rod 2 is arranged opposite to the clamping part 3. The moving rod 2 can be axially close to the clamping part 3 or away from the clamping part 3. In order to expand the pipe clamped by the clamping part 3, the front end of the moving rod 2 is plugged with an expanding part 4. The moving rod 2 can move relative to the clamping part 3 to insert or withdraw the expanding part 4 into or out of the pipe, that is, the expanding part 4 is used to expand the pipe.

[0065] Since the flaring component 4 is detachably connected to the front end of the moving rod 2, so that the appropriate flaring component 4 can be replaced according to the size of the pipe, it is necessary to make the detachment and connection of the flaring component 4 and the moving rod 2 more convenient and labor-saving, so as to improve the replacement efficiency. Figure 2 and 3 As shown, the expansion component 4 has a first locking portion, and the moving rod 2 has a second locking portion. The expansion device also includes an operating member 6 and a stopper 7. The operating member 6 is movably connected to the front end of the moving rod 2 or the expansion component 4. The connection position of the operating member 6 depends on the specific connection method between the expansion component 4 and the front end of the moving rod 2. The operating member 6 is operated to make the stopper 7 have a stopping state and a non-stopping state.

[0066] The pipe expanding device of the embodiment of the utility model connects the expanding component 4 and the moving rod 2 by plugging, and at the same time, an operating member 6 and a stopper 7 are provided. The operating member 6 enables the stopper 7 to have a stopping state and a non-stopping state, and can quickly switch between the two states. The expanding component 4 and the moving rod 2 are stably connected after plugging by the operating member 6 and the stopper 7. The stopper 7 in the stopping state prevents the expanding component 4 from being separated from the moving rod 2. The stopper 7 can also be made to lose its stopping function and be in a non-stopping state by the operating member 6, so that the expanding component 4 can be separated from the moving rod 2 for disassembly and replacement. There is no need for threaded engagement between the expanding component 4 and the moving rod 2. The axial fixation of the two can be achieved only by plugging and locking. The lock between the two can also be quickly released by the operating member 6, which is convenient for disassembly and installation, saves time and effort, and is conducive to improving work efficiency.

[0067] Specifically, the stopping state of the stopper 7 means that the stopper 7 is simultaneously engaged with the first engaging portion on the flaring component 4 and the second engaging portion on the moving rod 2, and at the same time the operating member 6 prevents the stopper 7 from being separated from either the first engaging portion or the second engaging portion. Thus, the flaring component 4 and the moving rod 2 are locked by the stopper 7 in the plug-in state, and the flaring component 4 can be stably inserted at the front end of the moving rod 2, so that under the action of the moving rod 2, the flaring component 4 can be inserted into or withdrawn from the tube to achieve flaring of the tube.

[0068] The non-stop state of the stop member 7 means that the stop member 7 can be separated from the first locking portion or the second locking portion or both the first locking portion and the second locking portion, and the stop member 7 no longer plays a stopping role. The flaring component 4 and the moving rod 2 only have an axial plug-in connection, and the flaring component 4 can leave the moving rod 2 in the opposite direction of the plug-in direction.

[0069] The operating member 6 can switch the stopper 7 between the stop state and the non-stop state. When the stopper 7 is in the stop state, the operating member 6 can keep the stopper 7 in the stop state. When the flaring component 4 needs to be pulled out, the operating member 6 is controlled to switch the stopper 7 to the non-stop state, so that the stopper 7 no longer has a stop function, and the flaring component 4 can be separated and removed from the moving rod 2.

[0070] Specifically, the operating member 6 can keep the stopper 7 in the stopped state in the following manner: the operating member 6 limits the activity space of the stopper 7 to be very small or substantially nonexistent, the stopper 7 is limited to be in the stopped position that is simultaneously engaged with the first engaging portion and the second engaging portion, and the separation movement of the flaring member 4 is blocked by the stopper 7 and cannot be separated. For example, in the following cases: the operating member 6 directly applies an action force to the stopper 7 at the beginning, so that the stopper 7 is in the stopped position that is simultaneously engaged with the first engaging portion and the second engaging portion, the stopper 7 is respectively abutted against the flaring member 4 and the operating member 6 at the same time, and the stopper 7 is substantially unable to move; or, the operating member 6 is located on the moving path when the stopper 7 is separated from either the first engaging portion or the second engaging portion, the operating member 6 may not contact the stopper 7 first, and when the stopper 7 moves a certain distance and abuts against the operating member 6, at this time, the stopper 7 still maintains the stopped state that is engaged with the first engaging portion and the second engaging portion to block the axial movement of the flaring member 4.

[0071] The operating member 6 switches the stop member 7 to the non-stop state in the following manner: due to the movement of the operating member 6, the movable space of the stop member 7 increases, and the stop member 7 can move a certain range relative to the first locking portion and the second locking portion, so that the stop member 7 is disengaged from at least one of the first locking portion and the second locking portion, and the stop member 7 no longer blocks the separation movement of the flaring component 4, thereby the flaring component 4 and the moving rod 2 are disassembled.

[0072] There are many implementation forms of the operating member 6, such as the attached Figure 1 In the embodiment shown, the operating member 6 is a sleeve 61, which will be described in detail below. Alternatively, the operating member 6 is a clamp 62 or a similar structure, as shown in the attached Fig. 9 As shown, the clamp 62 is tightened so that the clamp 62 limits the activity space of the stopper 7, and the radial activity space of the stopper 7 is limited to be very small or substantially nonexistent and is in a stopped state. Fig.10 As shown, loosening the clamp 62 increases the radial activity space of the stopper 7, and the stopper 7 can move radially for a certain distance before the stopper 7 is in a non-stop state. Alternatively, the operating member 6 is a button 63 or a similar structure, as shown in the attached Fig.11 As shown, by pressing the button 63, the radial activity space of the stopper 7 is limited to a very small or substantially nonexistent state, and the stopper 7 is in a stop state; Fig.12 As shown, the button 63 is released and moves away from the stopper 7, thereby increasing the radial activity space of the stopper 7. The stopper 7 can move a certain distance in the radial direction and then be in a non-stop state.

[0073] The following describes the working process of the operating member 6 and the stop member 7 by focusing on the embodiment in which the operating member 6 is a sleeve 61 .

[0074] As attached Figure 7 and attached Figure 8 As shown, the expansion component 4 includes a mounting frame 41, and the first clamping portion is a groove 411 arranged on the outer peripheral wall of the mounting frame 41. Figure 2 To Attachment Figure 5 As shown, the front end of the moving rod 2 has a receiving cavity 211 for receiving at least part of the mounting frame 41, the second locking portion is a through hole 212 arranged on the side wall of the receiving cavity 211, the through hole 212 is connected to the receiving cavity 211, and the operating member 6 has an operating surface 64 arranged toward the through hole 212.

[0075] The stopper 7 is movably arranged in the through hole 212, which means that the stopper 7 can move in the through hole 212, including radial movement of the stopper 7. The radial movement of the stopper 7 refers to the movement close to or away from the moving rod 2, that is, the movement along the radial direction of the circular moving rod 2. When the stopper 7 is in the corresponding stopping state, the radial movement of the stopper 7 in the through hole 212 is small or basically non-existent, and the stopper 7 is always partially embedded in the groove 411, and the stopper 7 engaged in the groove 411 blocks the axial movement of the flaring component 4. When the stopper 7 is in the corresponding non-stopping state, the radial movement of the stopper 7 in the through hole 212 is large, and the stopper 7 can be completely separated from the groove 411 without blocking the axial movement of the flaring component 4.

[0076] The operating surface 64 can contact with the stopper 7 means that, in the process of switching the stopper 7 from the non-stop state to the stopper 7, the operating surface 64 can contact with the stopper 7 and apply a radial force to the stopper 7 to limit the radial movement of the stopper 7. Therefore, the setting of the operating surface 64 determines the radial activity space of the stopper 7. When the stopper 7 is in the stopper state, the stopper 7 basically does not move radially or moves a very small distance radially and then contacts the stopper 7 and is restricted by the radial force and then continues to move radially, so that the stopper 7 can continue to engage with the through hole 212 and the groove 411. In this embodiment, the operating surface 64 is located on the inner wall of the sleeve 61. Of course, in other embodiments, the operating surface 64 can also be the inner side surface of the clamp 62, or the inner side surface of the button 63.

[0077] Based on the positional relationship between the stopper 7 and the operating surface 64, the operating surface 64 of the operating member 6 can exert a radial force on the stopper 7 to limit the radial movement distance of the stopper 7, so that the stopper 7 is radially engaged in the through hole 212 and the groove 411 at the same time, forming an axial limit for the mounting frame 41 and the moving rod 2, and the mounting frame 41 is locked with the front end of the moving rod 2 and cannot move relative to each other in the axial direction, so that the flaring component 4 moves synchronously with the moving rod 2 in the axial direction. The operating member 6 is operated / controlled to make its operating surface 64 radially away from or axially away from the stopper 7, and the radial movement space of the stopper 7 becomes larger, so that the stopper 7 can radially move away from the groove 411 under its own gravity or external force. After the stopper 7 is separated from the groove 411, there is no longer a connection relationship between the groove 411 and the through hole 212, and the stopper 7 no longer limits the mounting frame 41 and the moving rod 2 in the axial direction, and the mounting frame 41 can be pulled out of the accommodating cavity 211 at the front end of the moving rod 2. The operating surface 64 can easily realize the control and switching of the two states of the stopper 7, is easy to operate, and has a simple and reliable structure.

[0078] In this embodiment, the expansion component 4 and the front end of the moving rod 2 can be plugged in as follows: the mounting frame 41 is placed in the accommodating cavity 211 at the front end of the moving rod 2, and at the same time, the groove 411 (first clamping portion) on the outer periphery of the mounting frame 41 is arranged opposite to the through hole 212 (second clamping portion) on the side wall of the accommodating cavity 211; then the operating member 6 is controlled so that the operating surface 64 thereon drives the stop member 7 to move radially in the through hole 212 until it is simultaneously engaged with the groove 411 and the through hole 212 and is in a stop state, and the stop member 7 forms an axial limit for the mounting frame 41 and the moving rod 2, and the mounting frame 41 and the front end of the moving rod 2 are locked and cannot move relative to each other in the axial direction; in this process, the operating surface 64 can apply a radial force to the stop member 7, and after the stop member 7 is embedded in the groove 411 and the through hole 212, the radial movement space of the stop member 7 is limited by the operating surface 64 to be very small, so that the stop member 7 remains in a stop state simultaneously engaged with the groove 411 and the through hole 212.

[0079] The expansion component 4 and the front end of the moving rod 2 can be separated in the following manner: control the operating member 6 so that its operating surface 64 moves axially or radially away from the stop member 7, the radial movement space / distance of the stop member 7 increases, and the stop member 7 moves radially away from the groove 411 under the action of its own gravity or external force. After the stop member 7 is separated from the groove 411, there is no longer any connection relationship between the groove 411 and the through hole 212. At this time, the stop member 7 is in a non-stop state, and the stop member 7 no longer realizes axial limitation of the mounting frame 41 and the moving rod 2. The mounting frame 41 can be pulled out from the accommodating cavity 211 at the front end of the moving rod 2.

[0080] It should be noted that in some usage scenarios, when the stopper 7 is in a non-stop state, part of it may still be placed in the groove 411, but at this time there is no snap-fitting relationship between the stopper 7 and the groove 411. For example, when the expansion device is placed horizontally, the stopper 7 in the through hole 212 at the upper part of the support member 21 is still partially placed in the groove 411 due to the effect of gravity, and at this time there is sufficient radial movement distance between the operating surface 64 and the stopper 7, so that the stopper 7 is in a non-stop state. Therefore, when the mounting frame 41 is pulled out of the accommodating cavity 211 at the front end of the moving rod 2, the stopper 7 is radially moved away from the groove 411 by the outer peripheral surface of the mounting frame 41, and the expansion component 4 can also be separated from the moving rod 2. Therefore, it cannot be assumed that the stop member 7 is in the stopping state when part of the stop member 7 is placed in the groove 411. It is necessary to look at the size of the radial movement space of the stop member 7 and whether the stop member 7 and the groove 411 truly play a clamping role and block the axial movement of the expansion part 4 when the stop member 7 can be separated from the groove 411 to judge the state of the stop member 7.

[0081] It can be known that the method provided by the above embodiment is to insert the flaring component 4 into the accommodating cavity 211 at the front end of the moving rod 2, and the operating member 6 can be movably mounted on the front end of the moving rod 2, the first clamping portion is the groove 411, and the second clamping portion is the specific structure of the through hole 212, when the stop member 7 is disengaged from the groove 411 of the flaring component 4 and is in a non-stop state; technical personnel in this field should also know that when the accommodating cavity is provided at the end of the flaring component 4 facing the moving rod 2, that is, the front end of the moving rod 2 is inserted into the flaring component 4, at this time the operating member 6 can be movably mounted on the flaring component 4, the first clamping portion is the through hole, and the second clamping portion is the implementation scheme of the groove, when the stop member 7 is disengaged from the groove on the moving rod 2 and is in a non-stop state, it is just the opposite of the plug-in position of the above implementation scheme.

[0082] As attached Figure 2 Or 4, in this embodiment, the sleeve 61 is movably sleeved on the front end of the moving rod 2 and can move axially. For the convenience of description, the moving direction of the sleeve 61 axially away from the flaring component 4 is called the first direction, and the moving direction of the sleeve 61 axially close to the flaring component 4 is called the second direction. The first direction and the second direction are shown in FIG. Figure 2 Or as indicated by the arrow in 4.

[0083] Specifically, the operating surface 64 is a conical surface 611 of the inner wall of the sleeve 61 corresponding to the position of the through hole 212, so that the sleeve 61 has a large diameter end 612 and a small diameter end 613 arranged along the axial direction. Figure 5 As shown, when the sleeve 61 moves axially in the first direction so that the stopper 7 is in a non-stop state, the stopper 7 is close to the large diameter end 612, and the flaring component 4 moves axially so that the stopper 7 can exit the groove 411. Figure 3As shown, when the sleeve 61 moves axially in a second direction opposite to the first direction so that the stopper 7 is in a stopping state, the stopper 7 is close to the small diameter end 613 and the stopper 7 is partially inserted into the groove 411 to limit the axial movement of the flaring component 4.

[0084] Specifically, when the stopper 7 is close to the large diameter end 612, the space for the stopper 7 to move radially outward is larger, so the stopper 7 can exit the groove 411, whether the stopper 7 exits the groove 411 due to its own gravity or can exit the groove 411 under the action of external force, so that the stopper 7 and the groove 411 are disengaged. When the stopper 7 is close to the small diameter end 613, the space for the stopper 7 to move radially outward is very small or basically non-existent, so the stopper 7 is always engaged with the through hole 212 and the groove 411 at the same time and is in a stopping state. In the process of the stopper 7 switching from the non-stop state to the stop state, the conical surface 611 contacts the stopper 7 and applies a radial force to the stopper 7, which can quickly push the inner side of the stopper 7 into the groove 411. As a result, the sleeve 61 can more conveniently move the operating surface 64 therein, so that the operating surface 64 can quickly move to the radial outer side close to the stop member 7 or away from the radial outer side of the stop member 7, thereby realizing the switching of the stop member 7 between the stop state and the non-stop state, thereby making it easier and more labor-saving to disassemble and assemble the expanding part 4 with the moving rod 2; at the same time, by designing the dimensions of the large diameter end 612 and the small diameter end 613 of the conical surface 611, the radial movement distance of the stop member 7 can be more stably controlled, ensuring that the stop member 7 can stably switch between the stop state and the non-stop state.

[0085] As attached Figure 3 and attached Figure 5 As shown, in the present embodiment, the movable rod 2 includes a rod body 22 and a support member 21 fixed to the front end of the rod body 22, and the accommodating cavity 211 is opened on the end face of the support member 21, extending a predetermined distance from the front end of the support member to the rear end; the end of the support member 21 facing the flaring part 4 is the front end, and the conical surface 611 extends from the front end to the rear end of the sleeve 61, and the inner diameter gradually decreases to form the conical surface 611.

[0086] Preferably, an elastic component 23 is sleeved on the outer periphery of the support member 21, one end of the elastic component 23 is elastically pressed against the rod body 22, and the other end is elastically pressed against the sleeve 61, that is, the elastic component 23 is located at the axial rear end of the conical surface 611. The function of the elastic component 23 is to elastically act on the sleeve 61, so that after the sleeve 61 drives the operating surface 64 to move axially away from the stopper 7, the stopper 7 is in a non-stop state, and the elastic component 23 is in a compressed state. After the external force applied to the sleeve 61 is removed, the sleeve 61 can be quickly reset under the action of the elastic component 23, so that the stopper 7 switches to the stopper state, without additional operation, which is more convenient and labor-saving, and the resilience of the elastic component 23 is decomposed through the conical surface 611 to form a radial force on the stopper 7, which is sufficient to make the stopper 7 move radially inward and the inner side is stuck in the groove 411. The elastic component 23 in this embodiment can be a spring or other elastic element capable of axial deformation. In order to facilitate the installation of the sleeve 61 and the elastic component 23, the rod body 22 and the support member 21 are fixed in a split manner (can be fixed with screws), which is also convenient for processing the accommodating cavity 211 on the support member 21, and the overall cost is lower.

[0087] As attached Figure 3 and attached Figure 5 As shown, the inner wall of the sleeve 61 in this embodiment is provided with an annular flange 614, and the annular flange 614 is located at the axial rear side of the conical surface 611; the axial rear side of the annular flange 614 is provided with a sleeve 65, and the sleeve 65 is movably sleeved on the outer periphery of the support member 21, and the elastic component 23 is arranged between the sleeve 65 and the rod body 22. The sleeve 61 is sleeved on the outer periphery of the support member 21 through the sleeve 65, and the support member 21 is contacted through the inner side of the sleeve 65. The contact area is small, and the friction force is small, so that the axial movement and cooperation between the sleeve 61 and the support member 21 are smoother. The annular flange 614 on the inner wall of the sleeve 61 can position the sleeve 65 to prevent the sleeve 65 from moving relative to the sleeve 61. When the sleeve 61 moves along the first direction, the annular flange 614 of the sleeve 61 pushes the sleeve 65 to slide, and the sleeve 65 can squeeze the elastic component 23.

[0088] Furthermore, in order to protect the sleeve 65 and avoid the sleeve 65 from repeatedly squeezing the spring and damaging the sleeve 65 during repeated disassembly and assembly, the following Figure 3 and attached Figure 5 As shown, a first annular receiving groove 615 is opened on the inner wall of the sleeve 61 at the axial rear side of the annular flange 614, and a clamping ring 66 is arranged in the first annular receiving groove 615. The clamping ring 66 is movably sleeved on the outer periphery of the support member 21. The clamping ring 66 is located between the elastic component 23 and the sleeve 65. A first step surface 616 is formed on the inner wall of the sleeve 61, and the clamping ring 66 can abut against the first step surface 616 to limit the movement of the clamping ring 66 in the direction away from the rod body 22.

[0089] On the one hand, the first annular receiving groove 615 can accommodate and install the retaining ring 66. The first annular receiving groove 615 forms a first step surface 616 at the end portion axially close to the sleeve 65. A portion of the retaining ring 66 abuts against the end surface of the sleeve 65, and the other portion abuts against the first step surface 616. At the same time, the retaining ring 66 is axially positioned in the first annular receiving groove 615 by the elastic component 23; on the other hand, it can also accommodate part of the elastic component 23. When the sleeve 61 moves axially in the first direction, the retaining ring 66 is abutted by the sleeve 65 and pushed to move axially in the first direction, thereby compressing the elastic component 23. When the force on the sleeve 61 is removed, the rebound force of the elastic component 23 resets the retaining ring 66, and the retaining ring 66 and the first step surface 616 contact the stopper, thereby limiting the retaining ring 66 from continuing to move in the second direction.

[0090] As attached Figure 3 and attached Figure 5 As shown, the inner wall of the sleeve 61 is located on the axial rear side of the first annular receiving groove 615 and is provided with a second annular receiving groove 617. The second annular receiving groove 617 extends axially from the rear end of the sleeve 61 and is connected to the first annular receiving groove 615. The end portion of the rod body 22 extends into the second annular receiving groove 617. The inner wall of the sleeve 61 is formed with a second step surface 618, and the second step surface 618 can abut against the rod body 22 to limit the movement of the sleeve 61 toward the rod body 22.

[0091] On the one hand, the second annular receiving groove 617 can accommodate part of the end of the rod body 22 for guiding and matching, so as to prevent the sleeve 61 from being skewed or stuck with the end of the rod body 22 when the sleeve 61 moves axially relative to the rod body 22; on the other hand, the second annular receiving groove 617 forms a second step surface 618 at the end axially close to the first annular receiving groove 615. The distance from the second step surface 618 to the end of the rod body 22 is the distance that the sleeve 61 can axially approach the rod body 22, so that the axial movement distance of the sleeve 61 can be limited, so as to prevent the sleeve 61 from moving too far toward the direction of the rod body 22, and to prevent the through hole 212 and the stopper 7 from being separated from the coverage of the conical surface 611 of the sleeve 61, resulting in the stopper 7 completely coming out of the through hole 212. When the movable sleeve 61 moves in the first direction, until the second step surface 618 contacts the end of the rod body 22, the stopper 7 is in a non-stop state.

[0092] As attached Figure 3 and attached Figure 5 As shown, the outer periphery of the end of the support member 21 facing the flaring member 4 has a blocking portion 213, and the outer diameter of the blocking portion 213 is not less than the maximum circumferential diameter of the through hole 212 at the corresponding position on the side wall of the support member 21. Specifically, the maximum circumferential diameter of the through hole 212 at the corresponding position on the side wall of the support member 21 is D, and the blocking portion 213 is set at the axial front end of the maximum circumference of the through hole 212 at the corresponding position on the side wall of the support member 21, that is, it is set at Figure 5In addition, the blocking portion 213 can also limit the sleeve 61 from further moving toward the flared member 4 (the second direction), especially under the rebound effect of the spring 23, the blocking portion 213 with the enlarged inclined surface blocks the annular flange 614 from moving in the second direction. Of course, in order to better limit the movement of the annular flange 614 in the second direction, the inclined surface of the blocking portion 213 can also be extended beyond the through hole 212.

[0093] As attached Figure 3 As shown in FIG. 1 , when the small diameter end 613 of the conical surface 611 of the sleeve 61 is substantially opposite to the stopper 7, the blocking portion 213 is substantially located in the opening of the sleeve 61. Figure 5 As shown, when the sleeve 61 is moved along the first direction and the large diameter end 612 of the conical surface 611 of the sleeve 61 is basically opposite to the stopper 7, the blocking portion 213 is exposed from the opening of the sleeve 61, and the stopper 7 is also close to the opening of the sleeve 61. Since the outer diameter of the blocking portion 213 is larger, the axial movement path of the stopper 7 is blocked. At the same time, the conical surface 611 of the sleeve 61 blocks the radial movement path of the stopper 7. The conical surface 611 and the blocking portion 213 cooperate with each other to prevent the stopper 7 from completely detaching from the through hole 212.

[0094] As a preferred embodiment, the stopper 7 is a sphere movably disposed in the through hole 212, and can be specifically a steel ball or a sphere made of other wear-resistant materials; Figure 8 As shown, the groove 411 is an annular groove, and the shape of the annular groove matches the sphere, so that when the sphere is engaged with the annular groove to form a stop state, the mounting frame 41 can rotate relative to the sphere. Therefore, after the mounting frame 41 is inserted into the accommodating cavity 211, the groove 411 and the through hole 212 are aligned at a predetermined axial position. The annular groove body enables the sphere in the through hole 212 to be engaged with the annular groove to form a stop state after movement regardless of the angle of the mounting frame 41, thereby realizing the installation of the flaring component 4 regardless of the angle, which is more convenient to install and use.

[0095] As attached Figure 1 To Attachment Figure 6 As shown, the moving rod 2 is a screw rod. When in use, the moving rod 2 is rotated to make it move axially, so the moving distance in the axial direction becomes controllable according to the thread design. The main body 1 includes a base 11 and a protrusion 12 located at the rear end of the base 11. The protrusion 12 has a threaded hole 121 for inserting the screw rod. The threaded hole 121 can be directly opened in the protrusion 12, or a hole can be punched in the protrusion 12 to fix a nut into the hole, and the screw rod is screwed into the nut. Through the rotation of the screw rod and the threaded hole 121, the moving rod 2 can move forward and backward while the screw rod rotates, so that the moving rod 2 can be rotated.

[0096] When the flaring member 4 is inserted into the pipe, the flaring member 4 will rotate along with the moving rod 2, and the rotating flaring member 4 will cause friction to the inner wall of the pipe. Figure 7 and Fig. 9 As shown, the flaring component 4 also includes a retaining frame 42 rotatably connected to the mounting frame 41 and a flaring piece 43 arranged on the retaining frame 42. The flaring piece 43 is sleeved and fixed on the retaining frame 42. The retaining frame 42 and the mounting frame 41 are rotatably connected, so that the flaring piece 43 and the moving rod 2 can also rotate relative to each other, thereby making it possible for the rotation of the moving rod 2 to not affect the flaring piece 43, and only transmit axial movement, thereby protecting the pipe.

[0097] Specifically, the retaining frame 42 has a retaining shaft 421 and a retaining cylinder 422. One end of the retaining shaft 421 passes through the center hole 412 of the mounting frame 41 and is partially exposed from the mounting frame 41. The end of the retaining shaft 421 protruding from the mounting frame 41 is clamped with a first gasket 423. The retaining shaft 421 is provided with a second gasket 424 located between the mounting frame 41 and the retaining cylinder 422. The retaining frame 42 is rotatably connected to the mounting frame 41 via the retaining shaft 421.

[0098] As attached Figure 1 and attached Figure 6 As shown, in a specific embodiment, the clamping component 3 is the same as the clamping device in the existing patent, including two clamping bodies 31 and two semicircular pipe clamps 32, the clamping body 31 has a mounting groove 311, the pipe clamp 32 is installed in the mounting groove 311, a first positioning member 33 is provided on the clamping body 31, and a second positioning member 34 is provided on the pipe clamp 32, the first positioning member 33 and the second positioning member 34 are locked and matched to secure the pipe clamp 32 in the mounting groove 311, specifically, the first positioning member 33 is a ball plunger, and the second positioning member 34 is a positioning groove opened on the pipe clamp 32, the positioning cooperation of the ball plunger and the positioning groove ensures the secure assembly of the pipe clamp 32.

[0099] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

[0100] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A pipe expansion device, comprising a main body, a moving rod and a clamping component arranged on the main body, wherein the clamping component is used to clamp the pipe; characterized in that: The front end of the moving rod is plugged with a flaring component, and the moving rod can move relative to the clamping component to insert or withdraw the flaring component into or out of the pipe; The expansion component has a first locking portion, and the moving rod has a second locking portion; The expansion device further comprises an operating member and a stop member, wherein the operating member is movably connected to the front end of the moving rod or the expansion member, and the operating member is operated so that the stop member has a stopping state and a non-stopping state; When the stopper is in a stopping state, the operating member causes the stopper to engage with the first clamping portion and the second clamping portion at the same time, and the stopper blocks the separation movement of the flaring component and the moving rod; When the stopper is in a non-stopping state, the stopper can be disengaged from at least one of the first locking portion and the second locking portion, and the flaring component can be separated from the moving rod.

2. The expansion device according to claim 1, characterized in that: The expansion component includes a mounting frame, and the first clamping portion is a groove arranged on the outer peripheral wall of the mounting frame; The front end of the moving rod has a receiving cavity for receiving at least a part of the mounting bracket; The second locking portion is a through hole provided on the side wall of the accommodating cavity, and the through hole is communicated with the accommodating cavity; The operating member has an operating surface disposed toward the through hole, the stopper is movably disposed in the through hole, and the operating surface can contact the stopper; The operating surface can drive the stopper to move radially in the through hole, so that the stopper partially enters the accommodating cavity and engages with the groove to form the stop state or disengages from the groove to form the non-stop state.

3. The expansion device according to claim 2, characterized in that: The operating member is a sleeve, which is movably sleeved on the front end of the moving rod and can move in the axial direction; The operating surface is a conical surface of the inner wall of the sleeve corresponding to the position of the through hole, so that the inside of the sleeve has a large diameter end and a small diameter end arranged along the axial direction; When the sleeve moves axially in the first direction so that the stopper is in a non-stop state, the stopper approaches the large-diameter end, and the flaring component moves axially so that the stopper can exit the groove; When the sleeve moves axially in a second direction opposite to the first direction so that the stopper is in a stopping state, the stopper is close to the small-diameter end, and the stopper is partially engaged in the groove to limit the axial movement of the flaring component.

4. The expansion device according to claim 3, characterized in that: The moving rod comprises a rod body and a support member fixed to the front end of the rod body, and the accommodating cavity is opened on the end surface of the support member; An elastic component is sleeved on the outer periphery of the support component, one end of the elastic component elastically presses against the rod body, and the other end of the elastic component elastically presses against the operating component.

5. The expansion device according to claim 4, characterized in that: The inner wall of the sleeve is provided with an annular flange, and the annular flange is located at the axial rear side of the conical surface; The annular flange has a sleeve on its axial rear side. The sleeve is movably sleeved on the outer periphery of the support member. The elastic component is arranged between the sleeve and the rod body.

6. The expansion device according to claim 5, characterized in that: The inner wall of the sleeve is provided with a first annular receiving groove on the axial rear side of the annular flange, and a clamping ring is arranged in the first annular receiving groove. The clamping ring is movably sleeved on the outer periphery of the support member, and the clamping ring is located between the elastic component and the sleeve. The inner wall of the sleeve is formed with a first step surface, and the clamping ring can abut against the first step surface to limit the movement of the clamping ring in a direction away from the rod body.

7. The expansion device according to claim 6, characterized in that: The inner wall of the sleeve is provided with a second annular accommodating groove at the axial rear side of the first annular accommodating groove, the second annular accommodating groove extends axially from the rear end of the sleeve and is connected with the first annular accommodating groove, the end portion of the rod body extends into the second annular accommodating groove, and the inner wall of the sleeve is formed with a second step surface, which can abut against the rod body to limit the movement of the sleeve toward the rod body.

8. The expansion device according to claim 4, characterized in that: The outer periphery of the end of the support member facing the flaring component has a blocking portion, and the outer diameter of the blocking portion is not less than the maximum circumferential diameter of the through hole at the corresponding position on the side wall of the support member.

9. The expansion device according to claim 2 or 3, characterized in that: The stopper is a sphere movably arranged in the through hole, the groove is an annular groove, and the shape of the annular groove matches the sphere, so that when the sphere is engaged with the annular groove to form the stop state, the mounting frame can rotate relative to the sphere.

10. The expansion device according to claim 2, characterized in that: The moving rod is a screw rod, and the expanding component also includes a retaining frame rotatably connected to the mounting frame and an expanding piece arranged on the retaining frame.

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