CN111619094A

CN111619094A - Plastic pipe fitting bending device and method

Info

Publication number: CN111619094A
Application number: CN202010614905.3A
Authority: CN
Inventors: 邹建军; 叶忠会; 姜涛; 李良军; 邓玉峰
Original assignee: Sichuan Duolian Industry Ltd
Current assignee: Sichuan Duolian Industry Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-04

Abstract

The invention relates to the technical field of pipe processing, in particular to a device and a method for processing a plastic pipe elbow; the technical scheme is as follows: the upper end of the arc-shaped die is provided with a deformation groove for accommodating the plastic pipe fitting, the notch of the deformation groove is provided with fixing components, and the fixing components are distributed at intervals along the length direction of the deformation groove; the plastic pipe fitting is characterized by further comprising a first connector and a second connector which are connected with a fluid supply system, wherein the first connector and the second connector are used for connecting two ends of the plastic pipe fitting, and the fluid supply system is used for inputting hot fluid or cold fluid to the plastic pipe fitting. According to the invention, hot fluid is input into the plastic pipe fitting through the fluid supply system to heat the plastic pipe fitting so as to enable the plastic pipe fitting to be softened and gradually fit with the deformation groove, then the plastic pipe fitting is fixed by the fixing assembly, normal-temperature fluid is introduced into the plastic pipe fitting to be cooled and shaped, and the bent plastic pipe fitting is detached after the plastic pipe fitting is completely shaped.

Description

Plastic pipe fitting bending device and method

Technical Field

The invention relates to the technical field of pipe machining, in particular to a device and a method for machining a plastic pipe elbow.

Background

In order to meet the use requirement, the pipeline is often required to be bent, but due to the characteristics of the plastic pipeline and the rubber pipeline, a bent piece is not easy to manufacture. At present, plastic bent pipes are generally manufactured by adopting integrated forming equipment, such as an injection molding machine, a compressor, an extruder, a die casting machine and the like, particularly, in the forming process of a plastic bent part, plastic raw materials are required to be heated into a molten state firstly and then injected into a mold for forming, the process is complex and is only suitable for large-scale production, and the plastic bent pipe is not suitable for bending formed plastic pipelines according to specific requirements.

Disclosure of Invention

Aiming at the technical problem that the existing processing equipment is difficult to bend the formed plastic pipeline, the invention provides the plastic pipe bending device and the processing method, which can bend the formed plastic pipeline and have the characteristics of simple structure, simple operation and high efficiency.

The invention is realized by the following technical scheme:

a plastic pipe fitting bending device comprises an arc-shaped die, wherein a deformation groove for accommodating a plastic pipe fitting is formed in the upper end of the arc-shaped die, and the deformation groove is bent into an arc shape along the length direction of the arc-shaped die; the notch of the deformation groove is provided with a plurality of fixing components for fixing the plastic pipe fittings, and the fixing components are distributed at intervals along the length direction of the deformation groove; the plastic pipe fitting is characterized by further comprising a first connector and a second connector which are connected with a fluid supply system, wherein the first connector and the second connector are used for connecting two ends of the plastic pipe fitting, and the fluid supply system is used for inputting hot fluid or cold fluid to the plastic pipe fitting.

When the pipe bending machine is used for pipe bending, one end of the plastic pipe is fixed at one end of the deformation groove through the fixing component, and hot fluid is input into the plastic pipe through the fluid supply system to heat and soften the plastic pipe, so that the plastic pipe is gradually attached to the deformation groove under the actions of the self weight of the plastic pipe, the gravity of the hot fluid and/or the assistance of external force; and then fixing the plastic pipe fitting by using the fixing assembly until the plastic pipe fitting is completely attached in the deformation groove. At the moment, normal temperature fluid is introduced into the bent plastic pipe through the switching pipeline to be cooled and shaped, and the bent plastic pipe fitting is detached after complete shaping and cooling. The deformation groove can be made into grooves with different radiuses and arc lengths according to the requirement so as to process bent pipes with different radiuses and arc lengths and meet the customized requirement.

Furthermore, the plastic pipe bending device further comprises a supporting spring which is used in a matched mode, wherein the supporting spring is used for supporting the inner wall of the plastic pipe, namely when the plastic pipe is bent, the supporting spring with the outer diameter matched with the plastic pipe to be processed is inserted into the supporting spring, so that the supporting spring can provide support for the plastic pipe when the plastic pipe is bent and deformed, and then the phenomenon that the surface of the plastic pipe is sunken and wrinkled in the bending process to influence the effect and the quality of the bent pipe is avoided.

As a specific embodiment of the fluid supply system, the fluid supply system comprises a hot fluid tank and a cold fluid tank; outlets of the hot fluid tank and the cold fluid tank are connected with a liquid inlet reversing valve, and inlets of the hot fluid tank and the cold fluid tank are connected with a second joint through a liquid return reversing valve; the reversing valve is connected with the first joint, and a circulating pump is arranged between the first joint and the reversing valve so as to control the circulating pump to circulate hot fluid or cold fluid through reversing of the reversing valve.

Furthermore, a heating module is arranged in the hot fluid box to heat and preserve heat of the fluid.

As specific implementation modes of the first joint and the second joint, the first joint and the second joint respectively comprise a sleeve joint cylinder, one end of the sleeve joint cylinder is open, the other end of the sleeve joint cylinder is provided with a connecting part, a sealing ring is arranged in the sleeve joint cylinder, and the sealing ring is used for sealing a gap between the sleeve joint cylinder and the plastic pipe fitting. When the plastic pipe fitting sealing device is used, the plastic pipe fitting is directly inserted into the sleeve joint cylinder, the sealing ring has certain elasticity, and the sealing effect can be still achieved after the plastic pipe fitting deforms.

Preferably, the material of the sealing ring is polytetrafluoroethylene rubber, so that the friction between the sealing ring and the plastic pipe fitting is reduced by utilizing the self-lubricating property of polytetrafluoroethylene, and the sufficient service life of the sealing ring can be ensured while the surface quality of the end part of the plastic pipe fitting is ensured.

Preferably, the open end of the sleeve joint barrel is provided with a guide taper section so that the end part of the plastic pipe fitting can be conveniently inserted into the sleeve joint barrel.

Specifically, the cross section of the deformation groove is semicircular to ensure that the plastic pipe fitting can be completely attached to the deformation groove after being deformed.

As a specific embodiment of the fixing assembly, the fixing assembly is an arc-shaped buckle assembly to realize rapid fixing and detachment of the plastic pipe fitting.

The invention also provides a plastic pipe bending method, which comprises the following steps:

connecting the lower end of the plastic pipe fitting to be processed with an outlet of a fluid supply system, and fixing one end of the plastic pipe fitting to be processed at one end of the deformation groove;

inserting a support spring from the upper end of the plastic pipe to be processed and connecting the upper end of the plastic pipe to be processed with an inlet of a fluid process system;

inputting hot fluid to the plastic pipe fitting to be processed through a fluid supply system to soften the plastic pipe fitting, and attaching the softened plastic pipe fitting to the deformation groove;

fixing the softened plastic pipe fitting in the deformation groove;

after the softened plastic pipe fitting is completely attached to the deformation groove, inputting cold fluid or normal-temperature fluid to the plastic pipe fitting through a fluid supply system, and cooling and shaping the plastic pipe fitting;

and taking the plastic pipe fitting out of the deformation groove, and bending the completely shaped plastic pipe fitting.

The invention has the beneficial effects that:

1. inputting hot fluid into the plastic pipe fitting through a fluid supply system to heat and soften the plastic pipe fitting, so that the plastic pipe fitting is gradually attached to the deformation groove under the actions of the self weight of the plastic pipe fitting, the gravity of the hot fluid and/or the assistance of external force; then fixing the plastic pipe fitting by using the fixing component until the plastic pipe fitting is completely attached in the deformation groove; at the moment, normal temperature fluid is introduced into the bent plastic pipe through the switching pipeline to be cooled and shaped, and the bent plastic pipe fitting is detached after complete shaping and cooling.

2. The deformation groove can be made into grooves with different radiuses and arc lengths according to the requirements so as to process bent pipes with different radiuses and arc lengths and meet the customized requirements.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic view of an arcuate mold structure of the present invention;

FIG. 2 is a schematic diagram of the piping connection of the present invention;

FIG. 3 is a schematic view of a joint structure of the present invention;

fig. 4 is a schematic structural diagram of the fixing assembly of the present invention.

Reference numbers and corresponding part names in the drawings:

1-arc mould, 2-deformation groove, 3-fixed component, 4-first joint, 5-second joint, 6-support spring, 7-hot fluid tank, 8-cold fluid tank, 9-liquid inlet reversing valve, 10-circulating pump, 11-heating module, 12-sleeve, 13-connecting part, 14-sealing ring, 15-guide cone section, 16-plastic pipe fitting and 17-liquid return reversing valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

Example 1

A plastic pipe fitting bending device comprises an arc-shaped die 1, wherein a deformation groove 2 for accommodating a plastic pipe fitting 16 is formed in the upper end of the arc-shaped die 1, and the deformation groove 2 is bent into an arc shape along the length direction of the arc-shaped die 1; a plurality of fixing assemblies 3 for fixing the plastic pipe fittings 16 are arranged at the notch of the deformation groove 2, and the fixing assemblies 3 are distributed at intervals along the length direction of the deformation groove 2; the plastic pipe fitting is characterized by further comprising a first joint 4 and a second joint 5 which are connected with a fluid supply system, wherein the first joint 4 and the second joint are used for connecting two ends of the plastic pipe fitting 16, the fluid supply system is used for inputting hot fluid or cold fluid to the plastic pipe fitting 16 so as to heat the plastic pipe fitting 16 through the hot fluid to enable the plastic pipe fitting 16 to be softened and changed, and fixing the plastic pipe fitting through the fixing assembly 3, and then cooling and setting the plastic pipe fitting 16 through the cold fluid.

Further, the pipe bending machine further comprises a supporting spring 6 used in cooperation, wherein the supporting spring 6 is used for supporting the inner wall of the plastic pipe 16, that is, when the plastic pipe 16 is subjected to pipe bending, the supporting spring 6 with the outer diameter matched with the plastic pipe 16 to be processed is inserted into the supporting spring 6, so that the supporting spring can provide support for the plastic pipe 16 when the plastic pipe 16 is bent and deformed, and then the surface of the plastic pipe 16 is prevented from being sunken and wrinkled in the bending process, so that the effect and the quality of the pipe bending are prevented from being affected.

The fluid supply system comprises a hot fluid tank 7 and a cold fluid tank 8, wherein the hot fluid tank 7 is used for storing hot fluid, and the cold fluid tank 8 is used for storing normal-temperature fluid. Outlets of the hot fluid tank 7 and the cold fluid tank 8 are connected with a liquid inlet reversing valve 9, and inlets of the hot fluid tank 7 and the cold fluid tank 8 are connected with the second joint 5 through a liquid return reversing valve 17; the reversing valve 9 is connected with the first joint 4, and a circulating pump 10 is arranged between the first joint 4 and the reversing valve 9 so as to control the circulating pump 10 to circulate hot fluid or cold fluid by reversing the liquid inlet reversing valve 9 and the liquid return reversing valve 17.

Further, a heating module 11 is arranged in the thermal fluid tank 7 to heat and preserve heat of the fluid, and it can be understood that the heating module 11 is usually an electric heating module with a temperature control switch, and may also be a heat exchange module connected with a heat source.

As specific implementation manners of the first joint 4 and the second joint 5, the first joint 4 and the second joint 5 both include a sleeve joint cylinder, one end of the sleeve joint cylinder is open, the other end of the sleeve joint cylinder is provided with a connecting portion 13, a sealing ring 14 is arranged in the sleeve joint cylinder, and the sealing ring 14 is used for sealing a gap between the sleeve joint cylinder and the plastic pipe 16. When the plastic pipe fitting 16 is used, the plastic pipe fitting 16 is directly inserted into the sleeve, and the sealing ring 14 has certain elasticity and can still play a role in sealing after the plastic pipe fitting 16 deforms.

Preferably, the material of the seal ring 14 is teflon rubber, so that the friction between the seal ring 14 and the plastic pipe 16 is reduced by utilizing the self-lubrication of teflon, and the sufficient service life of the seal ring 14 can be ensured while the surface quality of the end part of the plastic pipe 16 is ensured.

Preferably, the open end of the sleeve is provided with a guiding taper section 15 so that the end of the plastic pipe fitting 16 can be inserted into the sleeve.

Specifically, the deformation groove 2 has a semicircular cross section so as to ensure that the plastic pipe 16 can be completely fitted to the deformation groove after being deformed.

As a specific embodiment of the fixing assembly 3, the fixing assembly 3 is an arc-shaped buckle assembly to achieve rapid fixing and detaching of the plastic pipe 16.

In order to ensure that the stress of the plastic pipe 16 is uniform after deformation, the fixing assemblies 3 are uniformly distributed along the length direction of the deformation groove 2.

It should be noted that the fluid mentioned in this example is usually a liquid, such as water, an aqueous solution or an oil immiscible with the composition of the plastic pipe to be processed, and the temperature of the hot fluid is determined according to the heat distortion softening temperature of the plastic pipe to be processed.

Example 2

A plastic pipe bending method comprises the following steps:

fixing the softened plastic pipe fitting in the deformation groove;

The method of bending the plastic pipe in example 1 will be described by taking the example of processing the PVC pipe:

the lower end of the PVC pipe is connected with a first connector 4 and is fixed at one end of a deformation groove 2 through an arc hasp component; then inserting the support spring 6 into the PVC pipe from the upper end of the PVC pipe, and sleeving the upper end of the PCV pipe with the second joint 5;

starting a circulating pump 10 to input boiling water into the PVC pipe to soften the PVC pipe, so that the PVC pipe is gradually attached to the deformation tank 2 under the action of the self weight of the PVC pipe, the gravity of the boiling water and/or the assistance of external force;

then fixing the PVC pipe by using the fixing component 3 until the PVC pipe is completely attached in the deformation groove 2;

at the moment, normal-temperature water is introduced into the bent PVC pipe through the switching pipeline to cool and shape, after the PVC pipe is completely shaped and cooled, the arc-shaped hasp assembly is loosened, and the bent PVC pipe is detached.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The plastic pipe fitting bending device comprises an arc die (1), and is characterized in that a deformation groove (2) for accommodating a plastic pipe fitting (16) is formed in the upper end of the arc die (1), and the deformation groove (2) is bent into an arc shape along the length direction of the arc die (1);

a plurality of fixing assemblies (3) for fixing plastic pipe fittings (16) are arranged at the notch of the deformation groove (2), and the fixing assemblies (3) are distributed at intervals along the length direction of the deformation groove (2);

the plastic pipe fitting is characterized by further comprising a first connector (4) and a second connector (5) which are connected with a fluid supply system, wherein the first connector (4) and the second connector are connected with two ends of the plastic pipe fitting (16) in a connecting mode, and the fluid supply system is used for inputting hot fluid or cold fluid into the plastic pipe fitting (16).

2. The plastic pipe elbow processing device according to claim 1, further comprising a supporting spring (6) used in cooperation, wherein the supporting spring (6) is used for supporting the inner wall of the plastic pipe (16).

3. The plastic pipe elbow machining device according to claim 1, characterized in that the fluid supply system comprises a hot fluid tank (7), a cold fluid tank (8); outlets of the hot fluid tank (7) and the cold fluid tank (8) are connected with a liquid inlet reversing valve (9), and inlets of the hot fluid tank (7) and the cold fluid tank (8) are connected with the second joint (5) through a liquid return reversing valve (17); the reversing valve (9) is connected with the first joint (4), and a circulating pump (10) is arranged between the first joint (4) and the reversing valve (9).

4. The plastic pipe elbow machining device according to the claim 3, characterized in that a heating module (11) is arranged in the hot fluid tank (7).

5. The plastic pipe bending device according to claim 1, wherein the first joint (4) and the second joint (5) each comprise a socket, one end of the socket is open, the other end of the socket is provided with a connecting portion (13), a sealing ring (14) is arranged in the socket, and the sealing ring (14) is used for sealing a gap between the socket and the plastic pipe (16).

6. The plastic pipe elbow processing device according to claim 5, wherein the material of the sealing ring (14) is polytetrafluoroethylene rubber.

7. The plastic pipe elbow machining device according to the claim 5, characterized in that the open end of the sleeve is provided with a guiding cone section (15).

8. The plastic pipe elbow processing device according to claim 1, characterized in that the cross section of the deformation groove (2) is semicircular.

9. The plastic pipe elbow machining device according to claim 1, characterized in that the fixing component (3) is an arc-shaped buckle component.

10. The plastic pipe fitting bending method is characterized by comprising the following steps:

fixing the softened plastic pipe fitting in the deformation groove;

and after the softened plastic pipe fitting is completely attached to the deformation groove, inputting cold fluid or normal-temperature fluid to the plastic pipe fitting through the fluid supply system, and cooling and shaping the plastic pipe fitting.