Feeding device for PVC pipe production

Abstract

The utility model relates to the field of PVC (polyvinyl chloride) pipe production and manufacturing equipment, and discloses a feeding device for PVC pipe production, which comprises a workbench, a conveyor belt is rotatably arranged at the upper end of the inner side of the workbench, two bevel wheels are rotatably connected to the upper end of the workbench close to the middle point, one end of each bevel wheel is fixedly connected with a connecting wheel, and the other end of each bevel wheel is fixedly connected with a conveying belt. A telescopic film is fixedly arranged in the middle of the connecting wheel, the output end of the motor is fixedly connected with the bevel wheel, an air pressure pipe is fixedly connected to the inner side of a wheel body of the connecting wheel, a piston is slidably connected into the air pressure pipe, a connecting pipe is fixedly arranged at one end of the air pressure pipe, and the connecting pipe is fixedly arranged in the connecting wheel. According to the utility model, the flexible contact between the flexible film filled with gas and the PVC pipe replaces the rigid contact between the traditional roller and the PVC pipe, so that the contact area between the flexible film and the PVC pipe is increased, the friction force is dispersed on the surface, the influence on the PVC pipe is reduced, and the production quality of the PVC pipe is improved.

Description

Technical Field

[0001] The utility model relates to the field of PVC pipe production and manufacturing equipment, in particular to a feeding device for PVC pipe production. Background Art

[0002] During the production and cutting process of PVC pipes, a PVC pipe cutting and feeding device must be used to push the PVC pipes to the cutting equipment. Usually, the PVC pipe cutting and feeding device includes a conveyor belt and a roller arranged above the conveyor belt. The PVC pipes are squeezed between the roller and the conveyor belt, and the friction force provided during the rotation is used to transport the PVC pipes to complete the feeding process.

[0003] However, the traditional PVC pipe cutting and feeding device is in rigid contact with the PVC pipe, and wear is inevitable during use, which makes the roller surface thinner, resulting in a decrease in friction with the PVC pipe, and easily causes relative sliding between the PVC pipe and the feeding device, affecting the cutting accuracy of the final cutting device, resulting in a decrease in the processing quality of the finished PVC pipe. Utility Model Content

[0004] In view of the shortcomings of the existing PVC pipe cutting and feeding device mentioned in the background technology during use, the utility model provides a feeding device for PVC pipe production, which has the advantages of long service life and stable conveying friction, and solves the technical problems raised in the above background technology.

[0005] The utility model provides the following technical solution: a feeding device for PVC pipe production, comprising a workbench, a conveyor belt is rotatably arranged at the inner upper end of the workbench, two inclined wheels are rotatably connected at the midpoint of the upper end of the workbench, one end of the inclined wheel is fixedly connected to a connecting wheel, and a telescopic film is fixedly arranged in the middle of the connecting wheel.

[0006] Preferably, the motor output end is fixedly connected to the bevel wheel, the inner side of the connecting wheel body is fixedly connected to an air pressure tube, a piston is slidably connected inside the air pressure tube, one end of the air pressure tube is fixedly provided with a connecting tube, the connecting tube is fixedly provided inside the connecting wheel, one end of the connecting tube is fixedly connected to the telescopic membrane, and one end of the piston is fixedly connected to a pressure-compensating spring.

[0007] Preferably, one end of the pressure-compensating spring is fixedly connected to an adjusting plate, the lower end of the adjusting plate is fixedly connected to a lifting rod, the lifting rod body is slidably connected to the air pressure tube, the lower end of the lifting rod is fixedly connected to a lifting block, the lower end of the lifting block is rotatably connected to two connecting rods, one end of the two connecting rods are rotatably connected to a threaded block, and the threaded block is threadedly sleeved with the adjusting rod.

[0008] Preferably, the adjusting rod is a bidirectional screw rod, which is composed of a forward thread section, a reverse thread section and a connecting section which are fixedly connected in sequence. The adjusting rod is made as an integral piece, the forward thread section is threadedly sleeved with one of the two thread blocks, and the reverse thread section is threadedly sleeved with the other thread block. A protective rod is fixedly connected to the upper end of the adjusting plate, and a protective block is fixedly connected to the upper end of the protective rod.

[0009] Preferably, one end of the connecting section is fixedly connected to a key rod, one end of the key rod is fixedly connected to a stop block, the rod body of the key rod is slidably sleeved with a key block, one side of the key block is fixedly connected to a turning handle, the outer side of the key block is slidably sleeved with a connecting shaft, the connecting shaft is fixedly connected to the bevel wheel, and the connecting shaft is rotatably connected to the workbench.

[0010] Preferably, a cutting device is fixedly provided on one side of the upper end of the workbench, a motor is arranged at a position close to the upper end of the front end of the workbench, and a plurality of air pressure tubes are provided.

[0011] The utility model has the following beneficial effects:

[0012] 1. The utility model drives the expansion film to rotate through the connecting wheel, and the expansion film cooperates with the conveyor belt to drive the PVC pipe to move to complete the feeding. The expansion film fits the arc surface of the outer wall of the PVC pipe, and is in elastic contact, which can avoid the possible vibration of the PVC pipe during transportation and cause additional wear. In addition, the surface fitting method is compared with the point contact method of the traditional feeding device wheel, which increases the friction surface and shares the friction force. The pressure at the fitting point of the expansion film and the PVC pipe is uniform, which reduces the wear on the PVC pipe and improves the quality of PVC pipe production.

[0013] 2. The utility model provides a pressure compensation structure. After the feeding device is used for a long time, the surface of the telescopic membrane is worn and thinned, and the telescopic membrane continues to expand, resulting in a decrease in internal air pressure. The adjustment structure cooperates with the pressure compensation spring and piston in the air pressure pipe to compensate for the pressure in the telescopic membrane, so that the contact friction between the telescopic membrane and the PVC pipe is always kept stable, thereby improving the service life of the feeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a partial structural schematic diagram of the utility model;

[0016] Figure 3 For this utility model Figure 1 A three-dimensional schematic diagram of some structures in;

[0017] Figure 4 For this utility model Figure 3 A in the enlarged view;

[0018] Figure 5 For this utility model Figure 3 Schematic diagram of partial structural cross section;

[0019] Figure 6 For this utility model Figure 3 A schematic diagram of the structural cross section of the regulating mechanism;

[0020] Figure 7 For this utility model Figure 3 Schematic diagram of the structural cross-section at the connecting axis.

[0021] In the figure: 1. workbench; 2. conveyor belt; 3. cutting device; 4. motor; 5. key rod; 6. telescopic film; 7. bevel wheel; 8. adjusting rod; 801. forward thread section; 802. reverse thread section; 803. connecting section; 9. connecting shaft; 10. block; 11. turning handle; 12. connecting wheel; 13. air pressure tube; 14. key block; 15. thread block; 16. connecting rod; 17. lifting block; 18. lifting rod; 19. adjusting plate; 20. compensating pressure spring; 21. piston; 22. protection rod; 23. protection block; 24. connecting pipe. 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-Figure 3A feeding device for PVC pipe production includes a workbench 1, a conveyor belt 2 is rotatably arranged on the upper end of the inner side of the workbench 1, and the conveyor belt 2 is used to support and assist in conveying the PVC pipe. A cutting device 3 is fixedly arranged on one side of the upper end of the workbench 1, and the PVC pipe moves into the cutting device 3 for cutting. The upper end of the workbench 1 is rotatably connected to two bevel wheels 7 at the midpoint, and the bevel wheels 7 are used to guide the PVC pipe. A motor 4 is fixedly arranged on the upper end of the front end of the workbench 1, and the output end of the motor 4 is fixedly connected to the bevel wheel 7 for driving the bevel wheel 7 to rotate. One end of the bevel wheel 7 is fixedly connected to The connecting wheel 12 has a telescopic film 6 fixedly arranged in the middle thereof. The bevel wheel 7 drives the connecting wheel 12 to rotate, thereby driving the telescopic film 6 to rotate. The telescopic film 6 is filled with gas to open the telescopic film 6. When the feeding device is working, the PVC tube is arranged between the telescopic film 6 and the conveyor belt 2. The tube wall at the upper end of the PVC tube squeezes the telescopic film 6. The telescopic film 6 is concave and the concave part is in contact with the tube wall. At the same time, a preset pressure is provided to the PVC tube, so that the friction force driving the PVC tube to move is evenly distributed on the part where the telescopic film 6 is in contact with the tube wall, thereby avoiding the pressure on the tube wall from being concentrated on a point.

[0024] See also Figure 2 , Figure 3 , Figure 5 and Figure 6 The inner side of the connecting wheel 12 is fixedly connected to the air pressure tube 13, and a piston 21 is slidably connected inside the air pressure tube 13. A connecting tube 24 is fixedly arranged at one end of the air pressure tube 13, and the connecting tube 24 is fixedly arranged inside the connecting wheel 12. One end of the connecting tube 24 is fixedly connected to the telescopic membrane 6. The connecting tube 24 is used to connect the cavity of the air pressure tube 13 with the membrane cavity of the telescopic membrane 6. One end of the piston 21 is filled with gas consistent with that in the telescopic membrane 6. One end of the piston 21 is fixedly connected to a compensating spring 20, and the compensating spring 20 is used to provide elastic force to the piston 21 so that the piston 21 squeezes the side filled with gas. After the device is used for a long time, the surface of the telescopic membrane 6 in contact with the PVC tube is worn and thinned. The air pressure in the telescopic membrane 6 is always kept stable by the compensating spring 20 and the piston 21, thereby extending the service life of the feeding device.

[0025] See also Figure 3-Figure 6One end of the pressure compensation spring 20 is fixedly connected to an adjusting plate 19, and the lower end of the adjusting plate 19 is fixedly connected to a lifting rod 18. The rod body of the lifting rod 18 is slidably connected to the air pressure tube 13. The lower end of the lifting rod 18 is fixedly connected to a lifting block 17. The lower end of the lifting block 17 is rotatably connected to two connecting rods 16. One end of the two connecting rods 16 is rotatably connected to a threaded block 15. The threaded block 15 is threadedly sleeved with the adjusting rod 8. The adjusting rod 8 is a bidirectional screw. The specific thread sleeve relationship is: the adjusting rod 8 is composed of a forward thread segment 801, a reverse thread segment 802 and a connecting segment 803 that are fixedly connected in sequence. The adjusting rod 8 is made as a whole. The forward thread segment 801 is threadedly sleeved with one of the two thread blocks 15, and the reverse thread segment 802 is threadedly sleeved with the other thread block 15 is threadedly sleeved. When the adjusting rod 8 rotates, the two threaded blocks 15 move toward or away from each other, and then the lifting block 17 is adjusted to be away from or close to the air pressure tube 13 through the connecting rod 16. The lifting block 17 drives the lifting rod 18 to move, and then drives the adjusting plate 19 to move and adjust the compression degree of the compensation spring 20 between the adjusting plate 19 and the piston 21, so as to adjust the air pressure in the telescopic membrane 6. The upper end of the adjusting plate 19 is fixedly connected with a protective rod 22, and the upper end of the protective rod 22 is fixedly connected with a protective block 23. The protective rod 22 and the protective block 23 cooperate to provide temporary support force for the piston 21 when the elasticity of the compensating spring 20 fails. The excessive rebound of the piston 21 makes the air pressure in the telescopic membrane 6 too small, resulting in the telescopic membrane 6 not having enough pressure to fit the PVC pipe, so that the feeding device fails to function.

[0026] See also Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7One end of the connecting section 803 is fixedly connected to a key rod 5, one end of the key rod 5 is fixedly connected to a stopper 10, a key block 14 is slidably sleeved on the rod body of the key rod 5, a handle 11 is fixedly connected to one side of the key block 14, a connecting shaft 9 is slidably sleeved on the outer side of the key block 14, the connecting shaft 9 is fixedly connected to the bevel wheel 7, the bevel wheel 7 drives the connecting shaft 9 to rotate, the connecting shaft 9 is rotatably connected to the workbench 1, the connecting shaft provides support for one side of the bevel wheel 7, the bevel wheel 7 is rotatably connected to the connecting section 803, the bevel wheel 7 can be relative to the connecting section 803, the key block 14 is provided with a plurality of external keys, the connecting shaft 9 drives the key block 14 to rotate through the external keys, and the outer side of the key rod 5 is provided with External key, the key block 14 drives the key rod 5 to rotate through the external key, and then drives the connecting section 803 to rotate. This structure ensures that the adjusting rod 8 keeps rotating synchronously when the connecting wheel 12 rotates, and avoids the connecting wheel 12 driving the threaded block 15 to rotate through the connected structure under normal working conditions, so that the threaded block 15 and the adjusting rod 8 rotate relative to each other, thereby ensuring the reliability of the operation of the device. When it is necessary to control the rotation of the adjusting rod 8, pull the turning handle 11 to separate the key block 14 from the connecting shaft 9, and the key rod 5 always has an external key within the sliding range of the key block 14. The adjusting rod 8 is driven to rotate by rotating the turning handle 11, and the block 10 is used to prevent the key block 14 from falling off.

[0027] There are multiple air pressure pipes 13, which can expand the range of adjusting air pressure, so that the feeding device can adjust the air pressure to adapt to PVC pipes of different diameters. During the feeding process of the improved feeding device, the friction force for the movement of the PVC pipe is mainly provided by the telescopic film 6, and the conveyor belt 2 is auxiliary. The transportation speed of the conveyor belt 2 is consistent with the transportation speed of the telescopic film 6.

[0028] The usage (working principle) of the utility model is as follows:

[0029] Place the free end of the PVC pipe between the conveyor belt 2 of the telescopic membrane 6, start the motor 4 and the conveyor belt 2, the arc-shaped tube wall of the PVC tube below the telescopic membrane 6 squeezes the telescopic membrane 6 upward, so that the contact surface is arc-shaped and fits with the tube wall of the PVC, increasing the contact area and making the pressure on the contact surface uniform. The motor 4 drives the telescopic membrane 6 to rotate, and the telescopic membrane 6 drives the PVC tube to move to a preset position through friction with the conveyor belt 2 to complete the feeding. When it is necessary to adjust the air pressure in the telescopic membrane 6, pull out and turn the handle 11, adjust the compression amount of the pressure-compensating spring 20 in the air pressure tube 13, control the amount of gas compressed by the piston 21, and adjust the air pressure. After the adjustment is completed, push the handle 11 to make the key block 14 embed into the inner side of the connecting shaft 9.

[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.

[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 feeding device for PVC pipe production, comprising a workbench (1), wherein a conveyor belt (2) is rotatably arranged on the inner upper end of the workbench (1), Features: The upper end of the workbench (1) is rotatably connected to two bevel wheels (7) at the midpoint, one end of the bevel wheel (7) is fixedly connected to a connecting wheel (12), and a telescopic membrane (6) is fixedly arranged in the middle of the connecting wheel (12).

2. A feeding device for PVC pipe production according to claim 1, Features: The shaft of the bevel wheel (7) is fixedly connected to the output end of the motor (4); the inner side of the wheel body of the connecting wheel (12) is fixedly connected to the air pressure tube (13); a piston (21) is slidably connected inside the air pressure tube (13); a connecting tube (24) is fixedly arranged at one end of the air pressure tube (13); the connecting tube (24) is fixedly arranged inside the connecting wheel (12); one end of the connecting tube (24) is fixedly connected to the telescopic membrane (6); and one end of the piston (21) is fixedly connected to a pressure compensation spring (20).

3. A feeding device for PVC pipe production according to claim 2, Features: One end of the pressure compensation spring (20) is fixedly connected to an adjustment plate (19), the lower end of the adjustment plate (19) is fixedly connected to a lifting rod (18), the rod body of the lifting rod (18) is slidably connected to the air pressure tube (13), the lower end of the lifting rod (18) is fixedly connected to a lifting block (17), the lower end of the lifting block (17) is rotatably connected to two connecting rods (16), one end of the two connecting rods (16) is rotatably connected to a threaded block (15), and the threaded block (15) is threadedly sleeved with the adjustment rod (8).

4. A feeding device for PVC pipe production according to claim 3, Features: The adjusting rod (8) is a bidirectional screw rod. The adjusting rod (8) is composed of a forward threaded section (801), a reverse threaded section (802) and a connecting section (803) which are fixedly connected in sequence. The adjusting rod (8) is made in one piece. The forward threaded section (801) is threadedly sleeved with one of the two threaded blocks (15), and the reverse threaded section (802) is threadedly sleeved with the other threaded block (15). The upper end of the adjusting plate (19) is fixedly connected with a protective rod (22), and the upper end of the protective rod (22) is fixedly connected with a protective block (23).

5. A feeding device for PVC pipe production according to claim 4, Features: One end of the connecting section (803) is fixedly connected to a key rod (5), one end of the key rod (5) is fixedly connected to a stopper (10), the rod body of the key rod (5) is slidably sleeved with a key block (14), one side of the key block (14) is fixedly connected to a turning handle (11), the outer side of the key block (14) is slidably sleeved with a connecting shaft (9), the connecting shaft (9) is fixedly connected to the bevel wheel (7), and the connecting shaft (9) is rotatably connected to the workbench (1).

6. A feeding device for PVC pipe production according to claim 2, Features: A cutting device (3) is fixedly arranged on one side of the upper end of the workbench (1), a motor (4) is arranged at a position close to the upper end of the front end of the workbench (1), and a plurality of air pressure tubes (13) are arranged.

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