Pipe bending machine top wheel and pipe bending machine

Abstract

The utility model belongs to the technical field of pipe benders, and particularly relates to a pipe bender top wheel and a pipe bender. In order to overcome the defects that an existing pipe bending machine is not designed when heat preservation cotton is sleeved on a copper pipe, the pipe needs to be bent firstly, then the heat preservation cotton is sleeved, and the heat preservation cotton is difficult to sleeve, the pipe bending machine top wheel adopts the technical scheme that the pipe bending machine top wheel is used for bending a to-be-bent pipe coated with a heat preservation layer and comprises a top wheel body, a pipe bending groove is formed in the top wheel body; wherein the section of the pipe bending groove comprises a semicircular section at the inner end, a flaring section at the outer end and a quadrilateral section in the middle, and the flaring section is large in outside and small in inside. The top wheel of the pipe bending machine has the advantages that the section of the pipe bending groove comprises the semicircular section at the inner end, the flaring section at the outer end and the quadrilateral section in the middle, the radial deformation of a copper pipe during bending is prevented due to the arrangement of the quadrilateral section in the middle, and the roundness of the bent copper pipe is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of pipe bending machine technology, specifically relating to the top wheel of the pipe bending machine and the pipe bending machine, and is particularly suitable for bending copper pipes with insulation cotton. Background Technology

[0002] In the field of air conditioning cold chain technology, it is often necessary to bend copper pipes. One existing pipe bending machine has a top roller that moves back and forth in a straight line and a pair of rotating rollers. The rotating rollers have grooves that are adapted to the pipe to be bent. The pipe to be bent is placed in the grooves of the rotating rollers, and the top roller is perpendicular to the pipe to be bent, pressing the pipe to be bent.

[0003] This type of pipe bending machine uses a top wheel that moves back and forth in a straight line. The dimensions of the top wheel and rotor are adapted to the copper pipe. The top wheel groove includes a semi-circular inner section and a slightly open straight outer section. In actual operation (or when the air conditioner is actually working), the copper pipe is covered with insulation cotton. Users often need to put the insulation cotton on the copper pipe after bending. Because the copper pipe is already bent, putting on the insulation cotton is difficult, especially when there are multiple bends. Due to the size mismatch, users cannot use existing top wheels (the top wheel groove includes a semi-circular section and a straight section) to bend copper pipes covered with insulation cotton. Even if the top wheel groove size is increased accordingly, the copper pipe cannot be bent well (the roundness of the bent copper pipe is difficult to meet the requirements), and the insulation layer may break. See [reference needed]. Figure 9 and Figure 10 . Summary of the Invention

[0004] This utility model addresses the shortcomings of existing pipe bending machines that do not address the issue of not being designed for applying insulation cotton to copper pipes, which necessitates bending the pipe first and then applying the insulation cotton, making the application of the insulation cotton difficult. The utility model provides a top wheel and a pipe bending machine that allow the insulation cotton to be applied to the copper pipe before bending.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a pipe bending machine top wheel, used for bending pipes covered with an insulation layer, the pipe bending machine top wheel comprising:

[0006] The top wheel body has a curved pipe groove.

[0007] The cross-section of the bend includes a semi-circular section at the inner end, a flared section at the outer end, and a quadrilateral section in the middle, with the flared section being larger on the outside and smaller on the inside.

[0008] The pipe bending machine top wheel of this utility model has a bending groove cross section including an inner semi-circular section, an outer flared section and a middle quadrilateral section. Compared with the existing top wheel which does not have a bending groove with a middle quadrilateral section, the middle quadrilateral section has a shaping function to ensure the roundness of the copper tube after bending.

[0009] As an improvement, the diameter of the semicircular section is 0.2-1mm larger than the diameter of the corresponding pipe to be bent.

[0010] As an improvement, the length of the quadrilateral segment is 1 / 4 to 1 / 2 of the diameter of the pipe to be bent.

[0011] As an improvement, the top wheel body is also provided with a clearance groove to avoid the casing of the pipe bending machine.

[0012] As an improvement, the flared section has a larger size in the middle part of its circumference and smaller sizes at both ends, or the flared section has the same size at all points in its circumference.

[0013] As an improvement, the quadrilateral segment can be rectangular; alternatively, the bending machine's top wheel can be machined using a mold, resulting in an isosceles trapezoidal quadrilateral segment with the longer base facing outwards and the shorter base facing inwards. This creates a draft angle to facilitate the bending machine's top wheel's passage through the mold. The draft angle is typically between 0.5 and 4°, with around 2° being preferable. When the bending machine's top wheel is not machined using a mold, the quadrilateral segment does not require a draft angle, and in this case, the quadrilateral segment is rectangular.

[0014] As an improvement, the top wheel body includes an extended section along the reciprocating direction of the top wheel of the pipe bending machine, and the bending groove includes a 180° section and a straight section of the extended section.

[0015] Pipe bending machine, the pipe bending machine comprising:

[0016] frame;

[0017] The crossbeam is fixed to the frame and has wheel grooves.

[0018] A pair of rotating wheels are rotatably mounted on the crossbeam;

[0019] Top wheel;

[0020] The drive unit is mounted on the frame and drives the top wheel to move back and forth in a straight line perpendicular to the crossbeam.

[0021] The top wheel mentioned above is the top wheel of the pipe bending machine.

[0022] As an improvement to the pipe bending machine, the drive device includes a linear reciprocating push rod, and the push wheel is detachably connected to the push rod. There are various types of push wheels, each adapted to different diameters of pipes covered with insulation layers to be bent.

[0023] As an improvement to the pipe bending machine, two grooves are opened on the two opposite surfaces of the roller to accommodate pipes with different diameters and covered with insulation layers.

[0024] As an improvement to the pipe bending machine, the radius of the cross-section of the first groove is larger than that of the second groove, and the depth of the first groove is smaller than that of the second groove.

[0025] As an improvement to the pipe bending machine, there are four types of top rollers, which are adapted to 1 / 2, 5 / 8, 1 / 4 and 3 / 8 pipes to be bent respectively; the first roller groove is adapted to 1 / 2 and 5 / 8 pipes to be bent, and the second roller groove is adapted to 1 / 4 and 3 / 8 pipes to be bent.

[0026] The beneficial effects of the top wheel of the pipe bending machine of this utility model are: the cross section of the pipe bending groove includes a semi-circular section at the inner end, a flared section at the outer end, and a quadrilateral section in the middle. The quadrilateral section in the middle has a shaping function to ensure the roundness of the copper pipe after bending.

[0027] The pipe bending machine of this utility model adopts the pipe bending machine top wheel of this utility model, and has all the beneficial effects of the pipe bending machine top wheel of this utility model. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the pipe bending machine according to Embodiment 1 of this utility model.

[0029] Figure 2 This is a cross-sectional view of the roller of the pipe bending machine according to Embodiment 1 of this utility model.

[0030] Figure 3 This is a schematic diagram of the structure of the first type of top wheel of the pipe bending machine according to Embodiment 1 of this utility model.

[0031] Figure 4 This is a cross-sectional view of the top wheel of the pipe bending machine according to Embodiment 1 of this utility model.

[0032] Figure 5 This is a cross-sectional view of the top wheel of the pipe bending machine according to Embodiment 1 of this utility model after bending a copper pipe with an insulation layer.

[0033] Figure 6 This is a schematic diagram of the structure of the second type of top wheel of the pipe bending machine according to Embodiment 1 of this utility model.

[0034] Figure 7 This is a schematic diagram of the third type of top wheel of the pipe bending machine according to Embodiment 1 of this utility model.

[0035] Figure 8 This is a schematic diagram of the fourth type of top wheel of the pipe bending machine according to Embodiment 1 of this utility model.

[0036] Figure 9 and Figure 10 These are cross-sectional views at different angles after a copper tube covered with insulation is bent using an existing top roller.

[0037] In the diagram, 1 represents the frame;

[0038] 2. Crossbeam;

[0039] 3. Rotary wheel; 31. First wheel groove; 32. Second wheel groove;

[0040] 4. Top wheel; 41. Top wheel body; 411. Extension section; 42. Bend groove; 421. Semicircular section; 422. Flared section; 423. Quadrilateral section; 424. Arc transition section; 43. Clearance groove;

[0041] 5. Drive unit;

[0042] 6. Copper pipes;

[0043] 7. Insulation layer. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0045] See Figures 1 to 8 The pipe bending machine top wheel of this utility model embodiment is used to bend pipes covered with a heat insulation layer. The pipe bending machine top wheel includes:

[0046] The top wheel body has a curved pipe groove.

[0047] The cross-section of the bend includes a semi-circular section at the inner end, a flared section at the outer end, and a quadrilateral section in the middle, with the flared section being larger on the outside and smaller on the inside.

[0048] The pipe bending machine top wheel of this utility model has a bending groove cross section including an inner semi-circular section, an outer flared section and a middle quadrilateral section. Compared with the existing top wheel which does not have a bending groove with a middle quadrilateral section, the middle quadrilateral section has a shaping function to ensure the roundness of the copper tube after bending.

[0049] Example 1

[0050] See Figures 1 to 8 The pipe bending machine of Embodiment 1 of this utility model includes:

[0051] Rack 1;

[0052] Crossbeam 2, fixed on frame 1, has wheel grooves;

[0053] A pair of rotating wheels 3 are rotatably mounted on the crossbeam 2;

[0054] Top wheel 4;

[0055] The drive unit 5 is mounted on the frame 1 and drives the top wheel 4 to move back and forth in a straight line perpendicular to the crossbeam 2.

[0056] In this embodiment, the pipe bending machine is particularly suitable for bending copper pipes 6 covered with insulation layer 7. Insulation layer 7 is usually insulation cotton. Figure 1In the diagram, the insulation layer 7 and the copper pipe 6 are only for illustration purposes; usually, the insulation layer 7 completely wraps the copper pipe 6.

[0057] In this embodiment, the pipe bending machine is an electric pipe bending machine. In other embodiments, the pipe bending machine can also be manual. Regardless of whether it is electric or manual, the operation process of bending the copper pipe 6 covered with the insulation layer 7 is the same as the existing operation process of bending copper pipe 6.

[0058] In this embodiment, two grooves, namely the first groove 31 and the second groove 32, are opened on two opposite surfaces of the rotating wheel 3 to accommodate pipes with different diameters covered with insulation layer 7.

[0059] from Figure 2 (The size and position of the two dashed circles) It can be seen that in this embodiment, the radius of the cross section of the first wheel groove 31 is greater than that of the second wheel groove 32, and the depth of the first wheel groove 31 is less than that of the second wheel groove 32.

[0060] In this embodiment, the driving device 5 includes a linear reciprocating push rod, and a push wheel 4 is detachably connected to the push rod. Multiple push wheels 4 are available, each adapted to different diameter pipes covered with insulation layer 7. By replacing the push wheels 4, various diameter pipes covered with insulation layer 7 can be bent. The structure of the driving device 5 and the disassembly structure between the push wheel 4 and the push rod are existing technologies and will not be described in detail here.

[0061] In this embodiment, there are four types of top rollers 4, which are adapted to 1 / 2, 5 / 8, 1 / 4, and 3 / 8 pipes to be bent, respectively. The first groove 31 is adapted to 1 / 2 and 5 / 8 pipes to be bent, and the second groove 32 is adapted to 1 / 4 and 3 / 8 pipes to be bent. Only one type of roller 3 is needed to adapt to the four types of top rollers 4, so as to bend the four diameter pipes.

[0062] See Figure 4 In this embodiment, the top wheel 4 includes a top wheel body 41 with a curved groove 42. The cross-section of the curved groove 42 includes an inner semicircular segment 421, an outer flared segment 422, and a middle quadrilateral segment 423. The flared segment 422 is wider at the outside and narrower at the inside. The flared segment 422 and the quadrilateral segment 423 are rounded at the corners, and the outer end of the flared segment 422 is rounded. The junction of the flared segment 422 and the quadrilateral segment 423 is a rounded transition segment 424, which can prevent damage to the insulation layer 7. The semicircular segment 421 and the quadrilateral segment 423 are tangent.

[0063] In this embodiment, the diameter of the semicircular segment 421 of the bending groove 42 of the top roller 4 is 0.2-1mm larger than the corresponding pipe diameter (outer diameter) to be bent.

[0064] In this embodiment, the length of the quadrilateral segment 423 of the bending groove 42 of the top roller 4 is 1 / 4 to 1 / 2 of the diameter of the pipe to be bent.

[0065] See Figure 3 and Figure 4 In this embodiment, the top wheel body 41 of the first type of top wheel 4, which has the largest size, is also provided with a clearance groove 43 to avoid the outer shell of the pipe bending machine. Figure 1 The top roller 4 is adapted to 5 / 8 pipes to be bent. Among the four types of top rollers 4, this type of top roller 4 has the largest size. In order to reduce the stroke of the top roller 4 and avoid interference with the pipe bending machine housing, a clearance groove 43 is opened on the part of the top roller body 41 facing the pipe bending machine housing.

[0066] In this embodiment, the flared section 422 has a larger size in the middle of its circumferential direction and smaller sizes at both ends; that is, the base and legs of the isosceles trapezoid in the middle of the circumferential direction are both larger. Since the first type of top wheel 4 has the largest size, to avoid interference with the rotating wheel 3, the width of the first type of top wheel 4 parallel to the crossbeam 2 needs to be reduced. This requires making the flared section 422 larger in the middle and smaller at both ends. The angle of the bent groove 42 of the first type of top wheel 4 is less than 180°.

[0067] See Figure 5 By using the first type of top wheel 4 in this embodiment to bend the 5 / 8 copper tube 6, a better roundness can be obtained.

[0068] See Figure 6 In this embodiment, the second type of top wheel 4 is smaller in size (mainly in diameter) than the first type of top wheel 4. The second type of top wheel 4 also has a clearance groove 43. Due to its smaller diameter and width, the second type of top wheel 4 will not interfere with the rotating wheel 3, and therefore its flared section 422 has consistent dimensions throughout. The angle of the bend groove 42 of the second type of top wheel 4 is 180°.

[0069] See Figure 7 In this embodiment, the third type of top wheel 4 is smaller in size (mainly in diameter) than the first type of top wheel 4 and the second type of top wheel 4, thus eliminating the need for the clearance groove 43. The dimensions of the flared section 422 are also consistent throughout. The angle of the bend groove 42 of the third type of top wheel 4 is slightly greater than 180°.

[0070] See Figure 8 In this embodiment, the fourth type of top roller 4 is smaller in size (mainly in diameter) than the first, second, and third types of top roller 4, thus eliminating the need for the clearance groove 43. The dimensions of the flared section 422 are also consistent throughout. To reduce the stroke of the top roller 4, the wheel body of the fourth type of top roller 4 includes an extended portion along the reciprocating direction of the top roller 4 of the pipe bending machine. The bending groove 42 includes a 180° segment and a straight section of the extended portion.

[0071] In other embodiments, the dimensions of the top wheel 4 and the rotating wheel 3 can be designed according to the diameter of the copper tube 6 to accommodate more copper tubes of different diameters and / or insulation layers of different materials and thicknesses.

[0072] The beneficial effects of the pipe bending machine in Embodiment 1 of this utility model are as follows: The cross-section of the bending groove 42 of the top roller 4 includes an inner semi-circular section 421, an outer flared section 422, and a middle quadrilateral section 423. The middle quadrilateral section 423 has a shaping function, preventing or reducing the radial deformation of the copper pipe 6 during bending, and ensuring the roundness of the copper pipe 6 after bending. The junction of the flared section 422 and the quadrilateral section 423 is an arc transition section 424, which avoids the breakage of the insulation layer 7. The rotating wheel 3 has a first groove 31 adapted to 1 / 2 and 5 / 8 pipes to be bent and a second groove 32 adapted to 1 / 4 and 3 / 8 pipes to be bent. There are four types of top rollers 4, which are adapted to 1 / 2, 5 / 8, 1 / 4 and 3 / 8 pipes to be bent, respectively. Thus, four different diameter pipes to be bent can be bent by changing the top roller 4. The two larger top rollers 4 have clearance grooves 43. The largest top roller 4 has a reduced width to avoid the rotating wheel 3.

[0073] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the content described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A top wheel (4) of a pipe bending machine for bending a pipe material to be bent covered with a thermal insulation layer (7), characterized in that: The top wheel (4) of the pipe bending machine includes: The top wheel body (41) has a bent pipe groove (42); The cross section of the bent pipe groove (42) includes a semi-circular section (421) at the inner end, a flared section (422) at the outer end, and a quadrilateral section (423) in the middle. The flared section (422) is larger on the outside and smaller on the inside.

2. Pipe bending machine crown wheel (4) according to claim 1, characterized in that The diameter of the semicircular segment (421) is 0.2-1 mm larger than the diameter of the corresponding pipe to be bent; and / or, The length of the quadrilateral segment (423) is 1 / 4 to 1 / 2 of the diameter of the pipe to be bent.

3. Pipe bending machine crown wheel (4) according to claim 1, characterized in that The top wheel body (41) also has a clearance groove (43) to avoid the casing of the pipe bending machine; and / or, The flared section (422) has a large size in the middle part and a small size at both ends in the circumferential direction, or the flared section (422) has the same size in all parts in the circumferential direction; and / or the top wheel body (41) includes an extension in the reciprocating direction of the top wheel (4) of the pipe bending machine, and the bending groove (42) includes a 180° section and a straight section of the extension.

4. Pipe bending machine top wheel (4) according to claim 1, characterized in that The flared section (422) and the quadrilateral section (423) are rounded; and / or, The outer end of the flared section (422) is rounded.

5. Pipe bending machine top wheel (4) according to claim 1, characterized in that The quadrilateral segment (423) is rectangular; or, the top wheel (4) of the pipe bending machine is formed by a mold, and the quadrilateral segment (423) is an isosceles trapezoid, with the longer base of the quadrilateral segment (423) on the outside and the shorter base on the inside.

6. A pipe bending machine, characterized in that: The pipe bending machine includes: Rack (1); A crossbeam (2) is fixed on the frame (1) and has wheel grooves. A pair of rotating wheels (3) are rotatably mounted on a crossbeam (2); Top wheel (4); The drive unit (5) is mounted on the frame (1) and drives the top wheel (4) to move back and forth in a straight line perpendicular to the crossbeam (2); Wherein, the top wheel (4) is the top wheel (4) of the pipe bending machine as described in any one of claims 1 to 5.

7. The pipe bender of claim 6, wherein: The drive unit (5) includes a linear reciprocating push rod, and the push wheel (4) is detachably connected to the push rod. The push wheel (4) has a variety of types and is adapted to different diameter pipes covered with insulation layer (7) to be bent.

8. The pipe bender of claim 7, wherein: Two grooves are opened on the two opposite surfaces of the roller (3) to accommodate pipes with different diameters covered with insulation layer (7) to be bent.

9. The pipe bender of claim 8, wherein: The radius of the cross section of the first groove (31) is greater than that of the second groove (32), and the depth of the first groove (31) is less than that of the second groove (32).

10. The pipe bender of claim 9, wherein: There are four types of top rollers (4), which are adapted to 1 / 2, 5 / 8, 1 / 4 and 3 / 8 pipes to be bent respectively; the first groove (31) is adapted to 1 / 2 and 5 / 8 pipes to be bent, and the second groove (32) is adapted to 1 / 4 and 3 / 8 pipes to be bent.

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