Device for bending small-caliber pipe back and forth

Abstract

The utility model provides a back-and-forth bending device for a small-caliber pipe. Comprising a bending jig frame, a clamping jig frame, an upper connecting rod and a lower connecting rod, the bending jig frame comprises a bending jig seat, a bending slip, a bending handle and a swinging block; the bent clamping tile comprises a first bent clamping tile and a second bent clamping tile, and a split structure is formed to clamp a small-caliber pipe. A swing block is arranged on the side portion of the bending tire seat, and the bending handle is connected with the bending tire seat through the swing block. The clamping jig frame comprises a clamping jig seat, a clamping slip, a clamping handle, a loose joint block and a shoe-shaped bolt; the clamping slip comprises a first clamping slip body and a second clamping slip body, the second clamping slip body is fixed to the clamping base, and the first clamping slip body is connected to the clamping base through a shoe-shaped bolt and can advance or retreat from the first clamping slip body; a clamping handle is connected to the side part of the clamping tire seat, and a loose joint block is assembled on the clamping handle; and the upper connecting rod and the lower connecting rod are connected with the bending tire seat and the clamping tire seat to form a parallelogram linkage structure, and are bent back and forth at one time.

Description

Technical Field

[0001] The utility model relates to pipeline construction in the field of ships, in particular to a small-diameter pipe back-and-forth bending device. Background Art

[0002] During shipbuilding, a large number of small-diameter pipes need to be installed. These small-diameter pipes are usually arranged side by side, and the pipe joints need to be bent back and forth. These bends are currently made manually using flame heating.

[0003] However, in the process of implementing the technical solutions of the embodiments of the present application, the inventors of the present application discovered that the above technology has at least the following technical problems:

[0004] This flame-heated bending method has significant drawbacks. Because it relies on manual visual bending, pipe height differences and angle errors are large, making accuracy difficult to guarantee. The resulting uneven and unsightly appearance of the pipes after installation is also unsightly. Flame-heated bending can easily cause overheating and damage the pipe, wastes energy, and is inherently dangerous. Bends require the pipe to be secured in the field using a vise or other fixture, requiring both space and auxiliary tools. Summary of the Invention

[0005] To address the shortcomings of the prior art and the problem of flame heating easily causing overheating and damaging pipes, the present invention provides a device for bending small-diameter pipes back and forth. The device forms a parallelogram structure with a bending seat and a clamping seat via a lower connecting rod. The bending seat and the clamping seat always maintain a state of parallel movement with each other, eliminating the need for flame heating and achieving a single-step bending process. This device solves the technical problem of bending small-diameter pipes back and forth.

[0006] The solution adopted by the embodiment of this application to solve the technical problem is:

[0007] A small-diameter pipe back-and-forth bending device comprises a bending frame, a clamping frame, an upper connecting rod and a lower connecting rod;

[0008] The bending tire frame includes a bending tire seat, a bending clamping shoe, a bending handle, and a swing block. The bending clamping shoe is provided on the bending tire seat. The bending clamping shoe includes a first bending clamping shoe and a second bending clamping shoe. The first bending clamping shoe and the second bending clamping shoe are fixed to the bending tire seat and form a split structure to clamp the small-diameter pipe. A swing block is provided on the outside of the bending tire seat. The bending handle is connected to the bending tire seat through the swing block to drive the bending tire seat to move.

[0009] The clamping tire frame includes a clamping tire seat, a clamping shoe, a clamping handle, a joint block and a silver-shaped bolt; a clamping shoe is provided on the clamping tire seat, and the clamping shoe includes a first clamping shoe and a second clamping shoe. The first clamping shoe and the second clamping shoe form a split structure to clamp the small-diameter tube, wherein the second clamping shoe is fixed to the clamping tire seat, and the first clamping shoe is connected to the clamping tire seat by a silver-shaped bolt. Loosening or tightening the silver-shaped bolt can advance or withdraw the first clamping shoe; a clamping handle is connected to the side of the clamping tire seat, and a joint block is assembled on the clamping handle for connecting to the bent handle to form a fixed point;

[0010] The upper connecting rod is connected to the upper surface of the bending tire seat and the clamping tire seat, so as to link the bending tire seat and the clamping tire seat;

[0011] The lower connecting rod is composed of two parts, which are arranged in parallel. They are connected to the lower surface of the bending tire seat and the clamping tire seat, linking the bending tire seat and the clamping tire seat to form a parallelogram structure.

[0012] Among them, the bending tire seat and the clamping tire seat form a linkage structure through the lower connecting rod, and the upper connecting rod and the lower connecting rod are connected in parallel between the bending tire seat and the clamping tire seat to maintain the stability between the two; the bending tire seat is caused to move relative to the clamping tire seat through tension to bend the small-diameter tube.

[0013] In order to further solve the technical problems to be solved by the embodiments of the present application, in the bending handle provided in the embodiments of the present application, the bending handle includes a curved portion and a straight portion. A curved portion is provided at one end of the bending handle for human hand holding, and a straight portion is provided at the other end. The straight portion includes a connecting hole, a sliding groove and a reinforcement portion. The sliding groove is a long through groove for assembling a swing block. A connecting hole is provided at the front end of the sliding groove for connecting to a joint block of the clamping handle. A reinforcement portion is provided on the side of the sliding groove adjacent to the bent tire seat to prevent the sliding groove from being deformed by force.

[0014] Furthermore, the swing block includes a single ear and a double ear seat. A single ear for connecting to the bending tire seat is provided at one end of the swing block, and a double ear seat for connecting to the bending handle is provided at the other end. The pin passes through the sliding groove of the bending handle through the double ear seat, and the shaft sleeve on the pin slides in the sliding groove.

[0015] The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0016] 1. Since the embodiment of the present application adopts the technical means of forming a parallelogram structure in which the bending tire seat and the clamping tire seat are linked by the lower connecting rod, the bending tire seat and the clamping tire seat always maintain a state of parallel movement with each other. Therefore, when the clamping handle is held tightly and the bending handle is pulled, the force acts on the bending tire seat through the swing block, causing the bending tire seat to move along the direction of the bending handle. When the bending handle is pulled to be parallel to the clamping handle, the small-diameter tube is bent and deformed along with the movement of the bending tire seat, and the small-diameter tube is bent back and forth in one step, which effectively solves the technical problem of flame heating pipe bending in the prior art, and thus achieves the technical effect of one-time forming of back and forth bending without flame heating operation.

[0017] 2. Since the embodiment of the present application adopts the means of providing a wedge-shaped inclined surface on the clamping tire seat and providing a wedge-shaped protrusion on the clamping first clamping shoe, the wedge-shaped protrusion cooperates with the wedge-shaped inclined surface of the clamping tire seat, and the first clamping shoe can slide in the clamping groove of the clamping tire seat, which effectively solves the technical problem of adjusting the distance between the first clamping shoe and the second clamping shoe, thereby achieving the technical effect of one-time bending back and forth without the need for flame heating operation.

[0018] 3. Since the embodiment of the present application adopts the means of setting a first clamping tile groove hole on the first clamping tile, and assembling the first clamping tile groove hole through a Yuanbao-shaped bolt, the Yuanbao-shaped bolt can be loosened or tightened to advance or withdraw the first clamping tile and lock it in the clamping groove of the clamping seat, effectively solving the technical problem of clamping small-diameter pipes, and thus achieving the technical effect of one-time bending back and forth without the need for flame heating.

[0019] The utility model is suitable as a device for bending small-diameter pipes back and forth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is the southwest isometric view of this embodiment before bending;

[0022] Figure 2 This is the southwest isometric view of this embodiment after bending;

[0023] Figure 3 This is the main view of this embodiment;

[0024] Figure 4 This is a top view of the embodiment;

[0025] Figure 5 This is a left view of the embodiment;

[0026] Figure 6 It is a right view of this embodiment;

[0027] Figure 7 This is a bottom view of the present embodiment;

[0028] Figure 8 It is the AA section view;

[0029] Figure 9 It is the BB cross-section;

[0030] Figure 10 is the CC cross-section;

[0031] Figure 11 It is the DD cross-section;

[0032] Figure 12 It is the EE cross-section;

[0033] Figure 13 It is the FF cross-section;

[0034] Figure 14 For the bent handle southwest isometric;

[0035] Figure 15 For the swing block southwest isometric;

[0036] Figure 16 This is the southeast isometric view of the curved placenta;

[0037] Figure 17 The southwest isometric view of the first bending tile;

[0038] Figure 18 This is the southeast isometric view of the second bending tile;

[0039] Figure 19 Southeast isometric view of the clamped placenta;

[0040] Figure 20 Southwest isometric view of the first tile holder;

[0041] Figure 21 Southeast isometric view of the second tile holder;

[0042] Figure 22 Southwest isometric drawing of the joint block.

[0043] In the picture:

[0044] 0. Small diameter tube,

[0045] 1. Bend the tire frame,

[0046] 11. Curved placenta,

[0047] 111.Bent groove,

[0048] 112.Bent bolt through hole,

[0049] 113. Assembly slot,

[0050] 114. Pin hole,

[0051] 12.Bent tiles,

[0052] 121. Bend the first tile,

[0053] 1211. Bend the first tile into a half-arc shape.

[0054] 1212. Bend the first tile to make it straight half tile.

[0055] 1213. Bend the first tile through hole,

[0056] 122. Bend the second tile,

[0057] 1221. Bend the second tile into a half arc.

[0058] 1222. Bend the second tile and make it straight half tile.

[0059] 1223. Bend the second tile through hole,

[0060] 13. Bent handle,

[0061] 131. Bend,

[0062] 132. Straight part,

[0063] 1321.Connection hole,

[0064] 1322. Slide trough,

[0065] 1323. Enhancement Department,

[0066] 14. Swing block,

[0067] 141. Single ear,

[0068] 142. Double ear seat,

[0069] 2. Clamp the tire frame,

[0070] 21. Clamp the placenta,

[0071] 211. Clamping groove,

[0072] 212. Clamping bolt through hole,

[0073] 213. Wedge-shaped slope,

[0074] 214. Clamping handle connection hole,

[0075] 22. Clamping tile,

[0076] 221. Clamp the first tile,

[0077] 2211. Clamp the first half tile of the arc,

[0078] 2212. Clamp the first tile straight half tile,

[0079] 2213. Clamp the first tile slot,

[0080] 2214. Wedge-shaped protrusion,

[0081] 222. Clamp the second tile,

[0082] 2221. Clamp the second tile arc half tile,

[0083] 2222. Clamp the second tile straight half tile,

[0084] 2223. Clamp the second tile through hole,

[0085] 23. Clamping handle,

[0086] 24. Joint block,

[0087] 241. Double hanging ears,

[0088] 242. Side concave part,

[0089] 25. Ingot-shaped bolts,

[0090] 3. Upper connecting rod,

[0091] 4. Lower connecting rod. DETAILED DESCRIPTION

[0092] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0093] The embodiment of the present application solves the problem in the prior art that flame heating easily causes overheating and damage to the pipe when bending the pipe by providing a small-diameter pipe bending device. The device is used in the pipe bending to achieve one-time bending and forming without flame heating.

[0094] In this embodiment, the bent pipe is simply referred to as small-diameter pipe 0.

[0095] according to Figure 1-13 As shown, a small-diameter pipe back-and-forth bending device includes a bending tire frame 1, a clamping tire frame 2, an upper connecting rod 3 and a lower connecting rod 4;

[0096] The tire bending frame 1 includes a tire bending seat 11, a tire bending shoe 12, a tire bending handle 13, and a swing block 14. The tire bending seat 11 is a rectangular block. The tire bending shoe 12 is provided on the tire bending seat 11. The tire bending shoe 12 includes a first tire bending shoe 121 and a second tire bending shoe 122. The first tire bending shoe 121 and the second tire bending shoe 122 are fixed to the tire bending seat 11 and form a split structure to clamp the small-diameter pipe 0. A swing block 14 is provided on the outside of the tire bending seat 11. The bending handle 13 is connected to the tire bending seat 11 through the swing block 14 and is used to drive the tire bending seat 11 to move.

[0097] The clamping tire frame 2 includes a clamping tire seat 21, a clamping tile 22, a clamping handle 23, a joint block 24 and a gold ingot-shaped bolt 25; the clamping tire seat 21 is a rectangular block, and a clamping tile 22 is provided on the clamping tire seat 21. The clamping tile 22 includes a first clamping tile 221 and a second clamping tile 222. The first clamping tile 221 and the second clamping tile 222 form a split structure to clamp the small-diameter pipe 0, wherein the second clamping tile 222 is fixed On the clamping seat 21, the first clamping shoe 221 is connected to the clamping seat 21 by a silver-shaped bolt 25. Loosening or tightening the silver-shaped bolt 25 can advance or withdraw the first clamping shoe 221, thereby clamping or loosening the small-diameter pipe 0, thereby realizing rapid bending of the small-diameter pipe 0; a clamping handle 23 is connected to the side of the clamping seat 21, and a joint block 24 is assembled on the clamping handle 23 for connecting to the bending handle 13 to form a fixed point;

[0098] The upper connecting rod 3 is connected to the upper surface of the bending tire seat 11 and the clamping tire seat 21, so as to link the bending tire seat 11 with the clamping tire seat 21;

[0099] The lower connecting rod 4 is two pieces, arranged in parallel; connected to the lower surface of the bent tire seat 11 and the clamping tire seat 21, the bent tire seat 11 and the clamping tire seat 21 are linked to form a parallelogram structure;

[0100] The bending seat 11 and the clamping seat 21 form a linkage structure through the lower connecting rod 4. The upper connecting rod 3 and the lower connecting rod 4 are connected in parallel between the bending seat 11 and the clamping seat 21 to maintain stability between the two. The bending seat 11 is caused to move relative to the clamping seat 21 by tension to bend the small-diameter tube 0.

[0101] Specifically, when the first bending shoe 121 and the second bending shoe 122 on the bending tire seat 11 and the first clamping shoe 221 and the second clamping shoe 222 of the clamping tire seat 21 tighten the small-diameter tube 0, hold the clamping handle 23 tightly and pull the bending handle 13. The force acts on the bending tire seat 11 through the swing block 14, causing the bending tire seat 11 to move in the direction of the bending handle 13. The bending tire seat 11 and the clamping tire seat 21 always maintain a parallel movement state with each other, and the small-diameter tube 0 bends and deforms along with the movement of the bending tire seat 11. When the bending handle 13 is pulled to be parallel to the clamping handle 23, the tube bending operation is completed, and the small-diameter tube 0 obtains the required back-and-forth bending shape.

[0102] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0103] Since the bending tire seat 11 and the clamping tire seat 21 form a linked parallelogram structure through the lower connecting rod 4, the bending tire seat 11 and the clamping tire seat 21 always maintain a state of parallel movement with each other. Therefore, by holding the clamping handle 23 tightly and pulling the bending handle 13, the force acts on the bending tire seat 11 through the swing block 14, causing the bending tire seat 11 to move in the direction of the bending handle 13. When the bending handle 13 is pulled to be parallel to the clamping handle 23, the small-diameter tube 0 bends and deforms along with the movement of the bending tire seat 11, and the small-diameter tube 0 is bent back and forth in one step.

[0104] In order to ensure the stability of the structure of this embodiment, Figure 14 As shown, the bending handle 13 is a rod, including a curved portion 131 and a straight portion 132. The curved portion 131 is provided at one end of the bending handle 13 for human hand holding, and the other end is provided with a straight portion 132. The straight portion 132 includes a connecting hole 1321, a sliding groove 1322 and a reinforcement portion 1323. The sliding groove 1322 is a long through groove for assembling the swing block 14. A connecting hole 1321 is provided at the front end of the sliding groove 1322 for connecting to the articulated block 24 of the clamping handle 23. The side of the sliding groove 1322 adjacent to the bent tire seat 11 is provided with a reinforcement portion 1323 to prevent the sliding groove 1322 from being deformed by force.

[0105] Preferably, according to Figure 15As shown, the swing block 14 is a block structure, including a single ear 141 and a double ear seat 142. A single ear 141 is provided at one end of the swing block 14 for connecting to the bending tire seat 11, and a double ear seat 142 is provided at the other end for connecting to the bending handle 13. The pin passes through the double ear seat 142 and passes through the sliding groove 1322 of the bending handle 13. In this embodiment, the sleeve on the pin slides in the sliding groove 1322, and the sleeve and the inner wall of the sliding groove 1322 have rolling friction, which reduces resistance and wear. See the attached Figure 10 shown.

[0106] In order to further ensure the stability of the structure of this embodiment, Figure 16 As shown, the bent tire seat 11 is a U-shaped block structure, including a bent groove 111, a bent bolt through hole 112, an assembly groove 113 and a pin hole 114; a bent groove 111 for embedding the bent tile 12 is provided in the middle of the bent tire seat 11, and the bent groove 111 is arranged with bent bolt through holes 112 for connecting the bent first tile 121 and the bent second tile 122; an assembly groove 113 is provided in the middle of the wing plate on one side of the bent groove 111, and a pin hole 114 passes through the assembly groove 113 for assembling the swing block 14, wherein the single ear 141 of the swing block 14 is inserted into the assembly groove 113 and is rotatably connected to the bent tire seat 11.

[0107] Preferably, according to Figure 17 As shown, the bent first clamping tile 121 has different specifications corresponding to the small-diameter tube 0, including a bent first clamping tile arc half tile 1211, a bent first clamping tile straight half tile 1212 and a bent first clamping tile through hole 1213; the bent first clamping tile 121 is a block structure, and the bent first clamping tile through holes 1213 are arranged on the bent first clamping tile 121, which is used to fix it in the bent groove 111; a bent first clamping tile arc half tile 1211 and a bent first clamping tile straight half tile 1212 are provided on the side of the bent first clamping tile 121, the bent first clamping tile arc half tile 1211 is opposite to the clamping seat 21, and serves as a transition arc. Its size is larger than the small-diameter tube 0, which is convenient for pushing in and clamping; the bent first clamping tile straight half tile 1212 corresponds to the small-diameter tube 0, which is convenient for clamping the small-diameter tube 0.

[0108] Preferably, according to Figure 18 As shown, the curved second clamping shoe 122 has different specifications corresponding to the small-diameter pipe 0, has the same structure as the curved first clamping shoe 121 and is symmetrically arranged to the curved first clamping shoe 121, and includes a curved second clamping shoe arc half shoe 1221, a curved second clamping shoe straight half shoe 1222 and a curved second clamping shoe through hole 1223;

[0109] The curved second clamping tile 122 is provided with curved second clamping tile through holes 1223 for fixing it in the curved groove 111; a curved second clamping tile arc half tile 1221 and a curved second clamping tile straight half tile 1222 are provided on the side of the curved second clamping tile 122, the curved second clamping tile arc half tile 1221 is opposite to the clamping tire seat 21, and serves as a transition arc, and its size is larger than the small-diameter tube 0; the curved second clamping tile straight half tile 1222 corresponds to the small-diameter tube 0.

[0110] In order to optimize the structure of this embodiment, Figure 19 As shown, the clamping seat 21 is a block structure, including a clamping groove 211, a clamping bolt through hole 212, a wedge-shaped inclined surface 213 and a clamping handle connecting hole 214; a clamping groove 211 for embedding the first clamping tile 221 and the second clamping tile 222 is provided in the middle of the clamping seat 21, and a clamping bolt through hole 212 is arranged at the bottom of the clamping groove 211 for connecting the bent clamping tile 12; the second clamping tile 222 is assembled on one side of the clamping groove 211, and a wedge-shaped inclined surface 213 is provided on the other side of the clamping groove 211 for wedge-coupling with the first clamping tile 221 to ensure that the small-diameter pipe 0 is fixed and removed conveniently; a clamping handle connecting hole 214 is provided on the side of the clamping seat 21 away from the wedge-shaped inclined surface 213 for assembling the clamping handle 23 to hold it fixed.

[0111] Preferably, according to Figure 20 As shown, the first clamping tile 221 is a wedge-shaped block, including a first clamping tile arc half tile 2211, a first clamping tile straight half tile 2212, a first clamping tile slot 2213 and a wedge-shaped protrusion 2214; the first clamping tile slot 2213 is provided on the first clamping tile 221 for assembling the ingot-shaped bolt 25, and the outer side of the first clamping tile slot 2213 is provided with a wedge-shaped protrusion 2214 that cooperates with the wedge-shaped inclined surface 213 of the clamping tire seat 21. The loosening and tightening ingot-shaped bolt 25 can push in or out the clamping first clamping tile 221, thereby clamping or loosening the small-diameter tube 0; the side of the clamping first clamping tile 221 is provided with a first-clamping tile arc half tile 2211 and a first-clamping tile straight half tile 2212, the first-clamping tile arc half tile 2211 is opposite to the bent tire seat 11, and serves as a transition arc, and its size is larger than the small-diameter tube 0; the first-clamping tile straight half tile 2212 corresponds to the small-diameter tube 0.

[0112] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0113] Since the wedge-shaped inclined surface 213 is provided on the clamping seat 21 and the wedge-shaped protrusion 2214 is provided on the first clamping shoe 221, the wedge-shaped protrusion 2214 cooperates with the wedge-shaped inclined surface 213 of the clamping seat 21, and the first clamping shoe 221 can slide in the clamping groove 211 of the clamping seat 21, thereby adjusting the distance between the first clamping shoe 221 and the second clamping shoe 222, thereby clamping or loosening the small-diameter pipe 0;

[0114] Since the first clamping shoe 221 is provided with a first clamping shoe groove hole 2213 and is assembled in the first clamping shoe groove hole 2213 by the ingot-shaped bolt 25, the ingot-shaped bolt 25 can be loosened or tightened to push in or out the first clamping shoe 221 and lock it in the clamping groove 211 of the clamping tire seat 21.

[0115] Preferably, according to Figure 21 As shown, the second clamping tile 222 has the same structure as the curved first clamping tile 121 and the curved second clamping tile 122 and is symmetrically arranged with the first clamping tile 221, including a second clamping tile arc half tile 2221, a second clamping tile straight half tile 2222 and a second clamping tile through hole 2223;

[0116] The second clamping tile 222 is provided with a second clamping tile through hole 2223 for fixing it in the clamping groove 211; the second clamping tile arc half tile 2221 and the second clamping tile straight half tile 2222 are provided on the side of the second clamping tile 222, the second clamping tile arc half tile 2221 is opposite to the bent tire seat 11, serving as a transition arc, and its size is larger than the small-diameter tube 0; the second clamping tile straight half tile 2222 corresponds to the small-diameter tube 0.

[0117] In order to further optimize the structure of this embodiment, Figure 22 As shown, the articulation block 24 is a block-shaped structure, with a side recess 242 provided at one end of the articulation block 24 for connecting the clamping handle 23, and a double ear 241 provided at the other end for connecting the bent handle 13, wherein the connecting hole 1321 of the bent handle 13 is inserted into the double ear 241 to form a rotational connection through the rotating shaft.

[0118] In order to further optimize the structure of this embodiment, the upper connecting rod 3 and the lower connecting rod 4 are long strips with through holes at both ends.

[0119] As a conventional technical choice, the first bending shoe 121, the second bending shoe 122, the first clamping shoe 221 and the second clamping shoe 222 can be replaced with shoes of different specifications to bend small-diameter pipes 0 of different specifications.

[0120] The working process of this embodiment:

[0121] First, loosen the ingot-shaped bolt 25 to withdraw the first clamping shoe 221 outward, so that the bending handle 13 and the clamping handle 23 are at a 90° angle;

[0122] Next, insert the small-diameter tube 0 into the second clamping tile 222, pass through the middle of the bent first clamping tile 121 and the bent second clamping tile 122, determine the required bending position and bending direction of the small-diameter tube 0, push the first clamping tile 221 inward to clamp the small-diameter tube 0, and tighten the ingot-shaped bolt 25 to lock the small-diameter tube 0;

[0123] Next, hold the clamping handle 23 firmly, pull the bending handle 13, pull the bending handle 13 to be parallel to the clamping handle 23, and bend the small-diameter tube 0 back and forth once;

[0124] Finally, loosen the ingot-shaped bolt 25 to withdraw the clamping first clamping shoe 221 outward, shake the bending tire seat 11 and the clamping tire seat 21, and withdraw the small-diameter tube 0 from the device. The bending of the small-diameter tube 0 back and forth is completed.

[0125] Features of this embodiment:

[0126] This embodiment fundamentally solves the various drawbacks of the original pipe bending method and has many advantages:

[0127] 1. Easy to operate, just follow simple instructions.

[0128] 2. The pipeline does not need to be heated, which is safe, environmentally friendly and energy-saving.

[0129] 3. Bend two bends back and forth at the same time to form them in one go, which is fast and efficient.

[0130] 4. High precision, the pipe bending angle, height difference between the two ends and parallelism can be guaranteed to be consistent after each pipe is bent.

[0131] 5. It can be bent when installing pipelines on board, without the need for space or other auxiliary tools.

[0132] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for bending small-diameter pipes back and forth, characterized by: It comprises a bending tire frame (1), a clamping tire frame (2), an upper connecting rod (3) and a lower connecting rod (4); The bending tire frame (1) comprises a bending tire seat (11), a bending shoe (12), a bending handle (13) and a swing block (14); The bending clamping shoe (12) is provided on the bending tire seat (11), and the bending clamping shoe (12) includes a bending first clamping shoe (121) and a bending second clamping shoe (122); the bending first clamping shoe (121) and the bending second clamping shoe (122) are fixed to the bending tire seat (11) and form a split structure to clamp the small-diameter pipe (0); the swing block (14) is provided on the outside of the bending tire seat (11), and the bending handle (13) is connected to the bending tire seat (11) through the swing block (14) for driving the bending tire seat (11) to move; The clamping tire frame (2) comprises a clamping tire seat (21), a clamping shoe (22), a clamping handle (23), a joint block (24) and a gold ingot-shaped bolt (25); The clamping shoe (22) is provided on the clamping seat (21), and the clamping shoe (22) includes a first clamping shoe (221) and a second clamping shoe (222); the first clamping shoe (221) and the second clamping shoe (222) form a split structure to clamp the small-diameter tube (0), wherein the second clamping shoe (222) is fixed to the clamping seat (21), and the first clamping shoe (221) is connected to the clamping seat (21) through the ingot-shaped bolt (25), and loosening or tightening the ingot-shaped bolt (25) can advance or withdraw the first clamping shoe (221); the clamping handle (23) is connected to the side of the clamping seat (21), and the clamping handle (23) is equipped with the articulation block (24) for connecting to the bending handle (13) to form a fixed point; The upper connecting rod (3) is connected to the upper surfaces of the bent tire seat (11) and the clamping tire seat (21), so as to link the bent tire seat (11) and the clamping tire seat (21); The lower connecting rod (4) is composed of two pieces, which are arranged in parallel. The lower connecting rods (4) are connected to the lower surfaces of the bent tire seat (11) and the clamping tire seat (21), so as to link the bent tire seat (11) and the clamping tire seat (21) to form a parallelogram structure. The bending tire seat (11) and the clamping tire seat (21) form a linkage structure through the lower connecting rod (4), and the upper connecting rod (3) and the lower connecting rod (4) are connected in parallel between the bending tire seat (11) and the clamping tire seat (21) to maintain stability between the two. The bending tire seat (11) is caused to move relative to the clamping tire seat (21) by tension, thereby bending the small-diameter tube (0).

2. A small-diameter tube bending device according to claim 1, characterized in that: The curved handle (13) comprises a curved portion (131) and a straight portion (132); The curved portion (131) is provided at one end of the curved handle (13) for handholding, and the straight portion (132) is provided at the other end; the straight portion (132) includes a connecting hole (1321), a sliding groove (1322) and a reinforcing portion (1323); the sliding groove (1322) is a long through groove for assembling the swing block (14); the connecting hole (1321) is provided at the front end of the sliding groove (1322) for connecting with the articulated block (24) of the clamping handle (23); the reinforcing portion (1323) is provided on the side of the sliding groove (1322 adjacent to the curved tire seat (11) to prevent the sliding groove (1322) from being deformed by force.

3. A small-diameter tube bending device according to claim 2, characterized in that: The swing block (14) includes a single ear (141) and a double ear seat (142); The single ear (141) for connecting to the bent tire seat (11) is provided at one end of the swing block (14), and the double-ear seat (142) for connecting to the bent handle (13) is provided at the other end. The pin passes through the sliding groove (1322) of the bent handle (13) through the double-ear seat (142), and the sleeve on the pin slides in the sliding groove (1322).

4. A small-diameter tube bending device according to claim 3, characterized in that: The bent tire seat (11) comprises a bent groove (111), a bent bolt through hole (112), an assembly groove (113) and a pin hole (114); The bent groove (111) for embedding the bent tile (12) is provided in the middle of the bent tire seat (11), and the bent bolt through holes (112) are arranged in the bent groove (111) for connecting the first bent tile (121) and the second bent tile (122); the assembly groove (113) is provided in the middle of the wing plate on one side of the bent groove (111), and the pin hole (114) passes through the assembly groove (113) for assembling the swing block (14), wherein the single ear (141) of the swing block (14) is inserted into the assembly groove (113) and is rotatably connected to the bent tire seat (11).

5. A small-diameter tube bending device according to claim 4, characterized in that: The bent first clamping tile (121) has different specifications corresponding to the small-diameter tube (0), including a bent first clamping tile arc half tile (1211), a bent first clamping tile straight half tile (1212), and a bent first clamping tile through hole (1213); The bent first clamping tile (121) is provided with bent first clamping tile through holes (1213) for fixing it in the bent groove (111); a bent first clamping tile arc half tile (1211) and a bent first clamping tile straight half tile (1212) are provided on the side of the bent first clamping tile (121); the bent first clamping tile arc half tile (1211) is opposite to the clamping seat (21) and serves as a transition arc. Its size is larger than the small-diameter tube (0) and is convenient for pushing in and clamping; the bent first clamping tile straight half tile (1212) corresponds to the small-diameter tube (0) and is convenient for clamping the small-diameter tube (0).

6. A small-diameter tube bending device according to claim 5, characterized in that: The curved second clamping tile (122) has the same structure as the curved first clamping tile (121) and is symmetrically arranged with the curved first clamping tile (121), comprising a curved second clamping tile arc half tile (1221), a curved second clamping tile straight half tile (1222) and a curved second clamping tile through hole (1223); The curved second clamping tile (122) is provided with the curved second clamping tile through holes (1223) for fixing it in the curved groove (111); the curved second clamping tile arc half tile (1221) and the curved second clamping tile straight half tile (1222) are provided on the side of the curved second clamping tile (122); the curved second clamping tile arc half tile (1221) is opposite to the clamping tire seat (21) and serves as a transition arc, and its size is larger than the small-diameter tube (0); the curved second clamping tile straight half tile (1222) corresponds to the small-diameter tube (0).

7. The small-diameter tube bending device according to claim 1, characterized in that: The clamping tire seat (21) comprises a clamping groove (211), a clamping bolt through hole (212), a wedge-shaped inclined surface (213) and a clamping handle connecting hole (214); The clamping groove (211) for embedding the first clamping tile (221) and the second clamping tile (222) is provided in the middle of the clamping seat (21), and the clamping bolt through holes (212) are arranged at the bottom of the clamping groove (211) for connecting the bent clamping tile (12); the second clamping tile (222) is assembled on one side of the clamping groove (211), and the wedge-shaped inclined surface (213) is provided on the other side of the clamping groove (211) for wedge-matching with the first clamping tile (221) to ensure that the small-diameter pipe (0) is convenient and quick to fix and disassemble; the clamping handle connecting hole (214) is provided on the side of the clamping seat (21) away from the wedge-shaped inclined surface (213) for assembling the clamping handle (23) to hold it fixed.

8. The small-diameter tube bending device according to claim 7, characterized in that: The first clamping tile (221) comprises a first clamping tile arc half tile (2211), a first clamping tile straight half tile (2212), a first clamping tile slot (2213), and a wedge-shaped protrusion (2214); The first clamping tile (221) is provided with the first clamping tile slot hole (2213) for assembling the ingot-shaped bolt (25), and the outside of the first clamping tile slot hole (2213) is provided with the wedge-shaped protrusion (2214) which cooperates with the wedge-shaped inclined surface (213) of the clamping tire seat (21). The ingot-shaped bolt (25) can be loosened or tightened to advance or withdraw the first clamping tile (221), thereby adjusting the small-caliber The tube (0) is clamped or loosened; the side of the clamping first clamping tile (221) is provided with the clamping first clamping tile arc half tile (2211) and the clamping first clamping tile straight half tile (2212); the clamping first clamping tile arc half tile (2211) is opposite to the bent tire seat (11), and serves as a transition arc, and its size is larger than the small-diameter tube (0); the clamping first clamping tile straight half tile (2212) corresponds to the small-diameter tube (0).

9. The small-diameter tube bending device according to claim 7, characterized in that: The second clamping tile (222) has the same structure as the bent first clamping tile (121) and the bent second clamping tile (122) and is symmetrically arranged with the first clamping tile (221), and comprises a second clamping tile arc half tile (2221), a second clamping tile straight half tile (2222) and a second clamping tile through hole (2223); The second clamping shoe (222) is provided with the second clamping shoe through hole (2223) for fixing it in the clamping groove (211); the second clamping shoe arc half shoe (2221) and the second clamping shoe straight half shoe (2222) are provided on the side of the second clamping shoe (222); the second clamping shoe arc half shoe (2221) is opposite to the bent tire seat (11) and serves as a transition arc, and its size is larger than the small-diameter tube (0); the second clamping shoe straight half shoe (2222) corresponds to the small-diameter tube (0).

10. The small-diameter tube bending device according to claim 2, characterized in that: The articulated block (24) is a block-shaped structure, and a side recess (242) is provided at one end of the articulated block (24) for connecting to the clamping handle (23), and a double lifting lug (241) is provided at the other end for connecting to the bending handle (13), wherein the connecting hole (1321) of the bending handle (13) is inserted into the double lifting lug (241), and a rotational connection is formed through a rotating shaft.

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