PVC pipe bending device

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) pipe machining, and discloses a PVC pipe bending device which comprises a machining table, a clamping component arranged at the top of a nut block and used for positioning a pipe, and a pipe bending component arranged in a U-shaped frame and used for bending and forming the pipe along the inner wall of a forming die cavity. One end of the pipe to be bent is fixed to the clamping assembly, then the first motor is used for driving the pipe on the clamping assembly to reciprocate in the axis direction of the ball screw, the purpose that manual work is replaced by a machine to determine the bending position of the pipe is achieved, and the operation difficulty is lowered; the outer side of a pipe is evenly heated through the preheating assembly, the clamping assembly pushes the pipe to advance to the forming die cavity along the limiting assembly, the driving assembly is started again to drive the pipe bending assembly in the U-shaped frame to press and form the pipe, and therefore the outer side of the pipe is evenly heated before pipe bending work, and the pipe is softened more sufficiently; and the pipe bending forming effect is better.

Description

Technical Field

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

[0002] PVC pipe is a synthetic material made of polyvinyl chloride resin, stabilizer, lubricant, etc., which is extruded by hot pressing. It has a wide range of uses. A large number of PVC pipes are needed in the process of water conservancy and water construction. Due to the complexity of waterways, special situations such as corners will inevitably be encountered when connecting adjacent PVC pipes. At this time, the staff will use equipment to bend the pipes before laying and constructing.

[0003] Currently, workers will first use a hot air gun to heat the part of the PVC pipe to be bent before bending it. However, this method cannot ensure that the outside of the pipe is heated at the same time and the temperature rises steadily. Often when hot air blows on one side of the pipe, the other side loses heat, causing uneven heating of the pipe, which greatly affects the subsequent bending effect of the pipe. At the same time, manual measurement is required to determine the bending position and then use a pipe bender to perform manual bending. The operation is relatively cumbersome, which increases the labor burden of the workers. Utility Model Content

[0004] The purpose of the utility model is to provide a PVC pipe bending device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a PVC pipe bending device, comprising a processing table, a plurality of H-shaped brackets are symmetrically installed at the bottom of the processing table, a quadrilateral through slot is opened on the top of one side of the processing table, third strip plates are vertically installed at the bottoms of both sides of the quadrilateral through slot, a ball screw is arranged between the third strip plates, the ball screw is rotatably connected to the third strip plates at both ends respectively, a first motor is fixedly installed on one side of one third strip plate away from the ball screw, one end of the ball screw passes through the third strip plate and is connected to the output end of the first motor, a nut block is spirally connected to the ball screw, and further comprises:

[0006] A clamping assembly for positioning the pipe is arranged on the top of the nut block, a semicircular block is fixedly connected to the top of one side of the processing table away from the clamping assembly, a first column is coaxially installed on the top of the semicircular block, a second column is coaxially installed on the bottom of the semicircular block, the outer side of the first column and the outer side of the second column are both rotatably connected to the limiting sleeve, a U-shaped frame is arranged between the limiting sleeves, the U-shaped frame is respectively connected to the limiting sleeves at both ends, and a forming cavity is opened on the outer wall of the semicircular block;

[0007] A pipe bending assembly is arranged inside the U-shaped frame to bend the pipe along the inner wall of the forming cavity. A preheating assembly is provided at one end of the forming cavity to facilitate the pipe bending work. A limiting assembly is provided between the preheating assembly and the clamping assembly to ensure the smooth movement of the pipe. A driving assembly is provided inside the processing table to drive the pipe bending assembly to rotate. A first gear is fixedly installed at the bottom end of the second column, and the first gear is meshed with the driving assembly.

[0008] Preferably, the clamping assembly includes a first strip plate fixed to the top of the nut block, the first strip plate is located above the top of the quadrilateral through groove, side plates are vertically installed on the top of both ends of the first strip plate, a second fixing seat is provided between the side plates, the bottom of the second fixing seat is connected to the first strip plate, a first fixing seat is provided above the second fixing seat, a second strip plate is fixedly connected to the top of the first fixing seat, arc grooves are provided at the bottom of the first fixing seat and the top of the second fixing seat, lifting cylinders are provided at the bottom of both ends of the second strip plate, the lifting cylinders are fixedly installed on the first strip plate, and the output end of the lifting cylinders is connected to the second strip plate.

[0009] Preferably, sliders are fixedly connected to the bottoms of both ends of the first strip plate, and sliding grooves corresponding to the sliders are provided on both sides of the inner wall of the quadrilateral through groove, and the sliders are located inside the sliding grooves.

[0010] Preferably, the bending pipe assembly includes a transmission shaft arranged inside the U-shaped frame, the top end of the transmission shaft is rotatably connected to the U-shaped frame through a bearing, the bottom end of the transmission shaft is fixedly connected to a guide block, an annular guide groove corresponding to the guide block is opened on the processing table, the guide block is located inside the annular guide groove, and a clamping wheel is coaxially rotatably connected to the middle part of the transmission shaft.

[0011] Preferably, the preheating assembly includes a third fixing seat fixed to one side of the semicircular block, a heat-insulating shell is fixedly connected to the top of the third fixing seat, a heat-conducting tube is fixedly connected to the inside of the heat-insulating shell, an insulation layer is provided between the heat-insulating shell and the heat-conducting tube, the insulation layer is made of glass wool or rock wool, a spiral heating wire is fixedly installed on the inner wall of the heat-conducting tube, the heat-conducting tube is connected to the molding cavity, a thermostat is fixedly installed on one side of the third fixing seat, and the thermostat is connected to the spiral heating wire terminal through a wire.

[0012] Preferably, the limiting assembly includes a second vertical plate arranged on the top of the processing table, there are two second vertical plates and they are arranged in parallel, the bottom of the second vertical plate is connected to the processing table, the top and bottom of the second vertical plate are provided with guide wheels, the guide wheels are located between the second vertical plates, and the guide wheels are rotatably connected to the second vertical plates on both sides through bearings.

[0013] Preferably, the driving assembly includes a second motor fixed inside the U-shaped frame, an output end of the second motor passes through the outside of the U-shaped frame and is fixedly connected to a second gear, and the second gear is meshed with the first gear.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model fixes one end of the pipe to be bent on the clamping component, and then uses the first motor to drive the pipe on the clamping component to move back and forth along the axis direction of the ball screw, so that the work of determining the bending position of the pipe is carried out by machine instead of manual work, which reduces the difficulty of operation and the labor burden of the staff; the outer side of the pipe is evenly heated by the preheating component, and after the heating is completed, the clamping component pushes the pipe along the limit component to the forming cavity, and the driving component is started again to drive the bending component inside the U-shaped frame to press the pipe into shape, so that the outer side of the pipe is evenly heated before the bending work, and the pipe is softened more fully, and the pipe bending and forming effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the PVC pipe bending device provided by the utility model;

[0017] Figure 2 A schematic diagram of the structure of the limit assembly provided by the utility model;

[0018] Figure 3 A schematic diagram of the structure of the clamping assembly provided by the utility model;

[0019] Figure 4 A schematic diagram of the structure of the elbow assembly provided by the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the preheating component provided by the utility model.

[0021] In the figure: 1, processing table; 2, H-shaped bracket; 3, quadrilateral through groove; 4, limiting sleeve; 5, forming cavity; 6, clamping assembly; 61, side plate; 62, lifting cylinder; 63, second strip plate; 64, first fixed seat; 65, arc groove; 66, first strip plate; 67, second fixed seat; 7, slider; 8, slide groove; 9, third strip plate; 10, nut block; 11, ball screw; 12, first motor; 13, limiting assembly; 131, second vertical plate; 132, guide wheel ; 14. Preheating assembly; 141. Third fixing seat; 142. Temperature controller; 143. Insulating shell; 144. Insulating layer; 145. Spiral heating wire; 146. Heat-conducting tube; 15. Semicircular block; 16. U-shaped frame; 17. Bend pipe assembly; 171. Pressure wheel; 172. Transmission shaft; 173. Guide block; 174. Annular guide groove; 18. First gear; 19. Driving assembly; 191. Second motor; 192. Second gear; 20. First column; 21. Second column. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0023] See also Figure 1-5As shown, a PVC pipe bending device comprises a processing table 1, and a plurality of H-shaped brackets 2 are symmetrically installed at the bottom of the processing table 1. By setting the H-shaped brackets 2, the processing table 1 and its top components can be supported; a quadrilateral through groove 3 is opened on the top of one side of the processing table 1, and third strip plates 9 are vertically installed at the bottom of both sides of the quadrilateral through groove 3. A ball screw 11 is arranged between the third strip plates 9, and the ball screw 11 is rotatably connected to the third strip plates 9 at both ends respectively, and a first motor 12 is fixedly installed on one side of one of the third strip plates 9 away from the ball screw 11, one end of the ball screw 11 passes through the third strip plate 9 and is connected to the output end of the first motor 12, and a nut block is spirally connected to the ball screw 11 10, by setting a first motor 12, the nut block 10 can be driven to slide back and forth along the axis direction of the ball screw 11, so as to adjust the position of the top pipe; it also includes: a clamping assembly 6 for positioning the pipe is set on the top of the nut block 10, by setting the clamping assembly 6, one end of the pipe can be fixed, and then the pipe on the clamping assembly 6 is driven by the first motor 12 to move back and forth, so as to determine the bending position of the pipe; a semicircular block 15 is fixedly connected to the top of the side of the processing table 1 away from the clamping assembly 6, a first column 20 is coaxially installed on the top of the semicircular block 15, and a second column 21 is coaxially installed on the bottom of the semicircular block 15, and the outer sides of the first column 20 and the second column 21 are both rotatably connected A limiting sleeve 4 is provided between the limiting sleeves 4, and a U-shaped frame 16 is provided between the limiting sleeves 4, and the U-shaped frame 16 is respectively connected to the limiting sleeves 4 at both ends. A forming cavity 5 is provided on the outer wall of the semicircular block 15. By providing the forming cavity 5, the pipe can be bent along the inner wall of the forming cavity 5, and thus bend and form; a bending pipe component 17 is provided inside the U-shaped frame 16 to bend the pipe along the inner wall of the forming cavity 5. By providing the bending pipe component 17, the U-shaped frame 16 can rotate with the first column 20 and the second column 21 as the center of the circle, thereby driving the bending pipe component 17 to press the pipe along the outer side of the forming cavity 5; a preheating component 14 is provided at one end of the forming cavity 5 to facilitate the bending work, and by providing the preheating component 14, the pipe can be bent when the pipe is bent. When bending, the outside of the pipe is evenly heated in advance, thereby reducing the difficulty of bending the pipe and facilitating the bending of the pipe; a limit component 13 is provided between the preheating component 14 and the clamping component 6 to ensure smooth movement of the pipe. By setting the limit component 13, the pipe is prevented from deviating on the path to the position of the bending component 17, thereby improving the processing stability; a driving component 19 is provided inside the processing table 1 to drive the bending component 17 to rotate, and a first gear 18 is fixedly installed at the bottom end of the second column 21, and the first gear 18 is meshed with the driving component 19. By setting the driving component 19, the U-shaped frame 16 can be driven to rotate coaxially along the outer side of the semicircular block 15 as a whole, thereby performing the pipe bending work.

[0024] The clamping assembly 6 includes a first strip plate 66 fixed to the top of the nut block 10, the first strip plate 66 is located above the top of the quadrilateral through slot 3, side plates 61 are vertically installed at the top of both ends of the first strip plate 66, a second fixing seat 67 is provided between the side plates 61, the bottom of the second fixing seat 67 is connected to the first strip plate 66, a first fixing seat 64 is provided above the second fixing seat 67, the top of the first fixing seat 64 is fixedly connected to the second strip plate 63, the bottom of the first fixing seat 64 and the top of the second fixing seat 67 are both provided with arc grooves 65, the bottom of both ends of the second strip plate 63 are provided with lifting cylinders 62, and the lifting cylinders 62 are fixedly installed on the first strip plate 66. The output end of the lifting cylinder 62 is connected to the second strip plate 63. The lifting cylinder 62 can drive the two first fixed seats 64 to clamp the pipe to be bent, so that the pipe is firmly positioned in the arc groove 65. Then, under the action of the first motor 12, it can be moved back and forth along the axial direction of the ball screw 11. The operation is convenient and the labor burden of the staff is reduced; the bottom of both ends of the first strip plate 66 is fixedly connected with a slider 7, and both sides of the inner wall of the quadrilateral through groove 3 are provided with a slide groove 8 corresponding to the slider 7. The slider 7 is located inside the slide groove 8. By setting the slider 7 and the slide groove 8, the clamping assembly 6 can be smoother in the process of moving back and forth, thereby improving the stability of the structure.

[0025] The bending pipe assembly 17 includes a transmission shaft 172 arranged inside the U-shaped frame 16. The top end of the transmission shaft 172 is rotatably connected to the U-shaped frame 16 through a bearing, and the bottom end of the transmission shaft 172 is fixedly connected to a guide block 173. An annular guide groove 174 corresponding to the guide block 173 is opened on the processing table 1, and the guide block 173 is located inside the annular guide groove 174. A clamping wheel 171 is coaxially rotatably connected to the middle part of the transmission shaft 172. By setting the clamping wheel 171, the pipe fitting can be pressed into shape in cooperation with the molding cavity 5. The annular guide groove 174 and the guide block 173 are used to make the displacement of the clamping wheel 171 smoother, thereby further improving the stability of the structure.

[0026] The preheating assembly 14 includes a third fixing seat 141 fixed to one side of the semicircular block 15, a heat-insulating shell 143 is fixedly connected to the top of the third fixing seat 141, a heat-conducting tube 146 is fixedly connected to the inside of the heat-insulating shell 143, a heat-insulating layer 144 is provided between the heat-insulating shell 143 and the heat-conducting tube 146, the heat-insulating layer 144 is made of glass wool or rock wool, a spiral heating wire 145 is fixedly installed on the inner wall of the heat-conducting tube 146, the heat-conducting tube 146 is connected to the molding cavity 5, a thermostat 142 is fixedly installed on one side of the third fixing seat 141, the thermostat 142 is connected to the terminal of the spiral heating wire 145 through a wire, by providing the spiral heating wire 145, the pipe can be evenly heated from the outside, so that the part to be bent is fully softened, which is conducive to the bending work, and at the same time, the heat-insulating shell 143, the heat-conducting tube 146, and the heat-insulating layer 144 can effectively reduce the heat loss, and the pipe heats up more quickly.

[0027] The limiting assembly 13 includes a second vertical plate 131 arranged on the top of the processing table 1. There are two second vertical plates 131 and they are arranged in parallel. The bottom of the second vertical plate 131 is connected to the processing table 1. The top and bottom of the second vertical plate 131 are provided with guide wheels 132. The guide wheels 132 are located between the second vertical plates 131. The guide wheels 132 are rotatably connected to the second vertical plates 131 on both sides through bearings. By setting the guide wheels 132, the displacement of the pipe during the movement can be limited to prevent the pipe fittings from being offset.

[0028] The driving assembly 19 includes a second motor 191 fixed inside the U-shaped frame 16. The output end of the second motor 191 passes through the outside of the U-shaped frame 16 and is fixedly connected to a second gear 192. The second gear 192 is meshed with the first gear 18. By setting the second motor 191, the second gear 192 can be driven to rotate along the outside of the first gear 18, thereby driving the bending pipe assembly 17 to press the pipe along the forming cavity 5.

[0029] Working principle: First, the staff fixes one end of the pipe to be bent on the clamping assembly 6, and then starts the first motor 12 to drive the pipe on the clamping assembly 6 to move back and forth along the axis direction of the ball screw 11 until the bending part of the pipe is completely located in the preheating assembly 14, and then the preheating assembly 14 evenly heats the outside of the pipe. After the heating is completed, the clamping assembly 6 pushes the pipe along the limit assembly 13 to the forming cavity 5, and the driving assembly 19 is started again to drive the bending assembly 17 inside the U-shaped frame 16 to press the pipe into shape. In this way, uniform heating of the outside of the pipe is achieved before the bending work, the pipe is softened more fully, and the pipe bending effect is better. In addition, machines are used instead of manual work to determine the bending position of the pipe and bend the pipe, which reduces the difficulty of operation and reduces the labor burden of the staff.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PVC pipe bending device, comprising a processing table (1), a plurality of H-shaped brackets (2) are symmetrically installed at the bottom of the processing table (1), a quadrilateral through groove (3) is opened at the top of one side of the processing table (1), third strip plates (9) are vertically installed at the bottom of both sides of the quadrilateral through groove (3), a ball screw (11) is arranged between the third strip plates (9), the ball screw (11) is rotatably connected to the third strip plates (9) at both ends respectively, a first motor (12) is fixedly installed on one side of one of the third strip plates (9) away from the ball screw (11), one end of the ball screw (11) passes through the third strip plate (9) and is connected to the output end of the first motor (12), a nut block (10) is spirally connected to the ball screw (11), and the characteristics are as follows: Also includes: A clamping assembly (6) for positioning the pipe is arranged on the top of the nut block (10); a semicircular block (15) is fixedly connected to the top of one side of the processing table (1) away from the clamping assembly (6); a first column (20) is coaxially installed on the top of the semicircular block (15); a second column (21) is coaxially installed on the bottom of the semicircular block (15); the outer sides of the first column (20) and the second column (21) are both rotatably connected to the limiting sleeve (4); a U-shaped frame (16) is arranged between the limiting sleeves (4); the U-shaped frame (16) is respectively connected to the limiting sleeves (4) at both ends; and a molding cavity (5) is opened on the outer wall of the semicircular block (15); A pipe bending assembly (17) is arranged inside the U-shaped frame (16) to bend a pipe along the inner wall of a forming cavity (5), one end of the forming cavity (5) is provided with a preheating assembly (14) to facilitate the pipe bending work, a limit assembly (13) is arranged between the preheating assembly (14) and the clamping assembly (6) to enable the pipe to move smoothly, a driving assembly (19) is arranged inside the processing table (1) to drive the pipe bending assembly (17) to rotate, and a first gear (18) is fixedly installed at the bottom end of the second column (21), and the first gear (18) is meshed with the driving assembly (19).

2. A PVC pipe bending device according to claim 1, characterized in that: The clamping assembly (6) comprises a first strip plate (66) fixed to the top of the nut block (10), the first strip plate (66) being located above the top of the quadrilateral through slot (3), side plates (61) being vertically mounted at the tops of both ends of the first strip plate (66), a second fixing seat (67) being arranged between the side plates (61), the bottom of the second fixing seat (67) being connected to the first strip plate (66), a first fixing seat (64) being arranged above the second fixing seat (67), the top of the first fixing seat (64) being fixedly connected to the second strip plate (63), the bottom of the first fixing seat (64) and the top of the second fixing seat (67) being provided with arc grooves (65), the bottoms of both ends of the second strip plate (63) being provided with lifting cylinders (62), the lifting cylinders (62) being fixedly mounted on the first strip plate (66), and the output end of the lifting cylinder (62) being connected to the second strip plate (63).

3. A PVC pipe bending device according to claim 2, characterized in that: The bottoms of both ends of the first strip plate (66) are fixedly connected with sliding blocks (7), and both sides of the inner wall of the quadrilateral through groove (3) are provided with sliding grooves (8) corresponding to the sliding blocks (7), and the sliding blocks (7) are located inside the sliding grooves (8).

4. A PVC pipe bending device according to claim 1, characterized in that: The bending pipe assembly (17) comprises a transmission shaft (172) arranged inside the U-shaped frame (16); the top end of the transmission shaft (172) is rotatably connected to the U-shaped frame (16) via a bearing; the bottom end of the transmission shaft (172) is fixedly connected to a guide block (173); an annular guide groove (174) corresponding to the guide block (173) is provided on the processing table (1); the guide block (173) is located inside the annular guide groove (174); and a pressure wheel (171) is coaxially rotatably connected to the middle part of the transmission shaft (172).

5. A PVC pipe bending device according to claim 1, characterized in that: The preheating assembly (14) comprises a third fixing seat (141) fixed to one side of the semicircular block (15); a heat insulating shell (143) is fixedly connected to the top of the third fixing seat (141); a heat conducting tube (146) is fixedly connected to the inside of the heat insulating shell (143); a heat insulating layer (144) is provided between the heat insulating shell (143) and the heat conducting tube (146); the heat insulating layer (144) is made of glass wool or rock wool; a spiral heating wire (145) is fixedly installed on the inner wall of the heat conducting tube (146); the heat conducting tube (146) is connected to the molding cavity (5); a temperature controller (142) is fixedly installed on one side of the third fixing seat (141); the temperature controller (142) is connected to the terminal of the spiral heating wire (145) through a wire.

6. A PVC pipe bending device according to claim 1, characterized in that: The limiting assembly (13) comprises a second vertical plate (131) arranged on the top of the processing table (1); there are two second vertical plates (131) arranged in parallel; the bottom of the second vertical plate (131) is connected to the processing table (1); the top and bottom of the second vertical plate (131) are both provided with guide wheels (132); the guide wheels (132) are located between the second vertical plates (131); and the guide wheels (132) are rotatably connected to the second vertical plates (131) on both sides through bearings.

7. A PVC pipe bending device according to claim 1, characterized in that: The driving assembly (19) comprises a second motor (191) fixed inside the U-shaped frame (16); an output end of the second motor (191) passes through the outside of the U-shaped frame (16) and is fixedly connected to a second gear (192); the second gear (192) is meshed with the first gear (18).

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