Processing equipment for polyurethane elbow pipe

Abstract

The utility model relates to machining equipment of a polyurethane elbow pipe, and relates to the field of pipeline machining equipment.The equipment comprises a positioning die, and a through hole allowing a steel pipe to penetrate through is formed in the positioning die; a plurality of rotating sticks are rotationally connected to the inner wall of the through hole, and a heating coil is arranged at a port of the through hole. The equipment further comprises a rotating arm and a chuck. One end part of the rotary arm is rotationally connected to the positioning mold, and the chuck is arranged on the rotary arm; the chuck comprises an upper clamping block and a lower clamping block which are hinged to each other, and semi-circular through grooves which are opposite to each other are formed in the upper clamping block and the lower clamping block. The large steel pipe bending device has the effect of being capable of bending large steel pipes.

Description

Technical Field

[0001] The present application relates to the field of pipeline processing equipment, and in particular to a processing equipment for polyurethane elbow pipes. Background Art

[0002] Polyurethane insulated pipes are insulated pipes that use rigid polyurethane foam as insulation material and are widely used in urban water supply, heating and oil pipeline transportation systems. Polyurethane insulated pipe elbows are connectors for pipelines in different directions. Their basic structure is consistent with that of polyurethane insulated pipes, consisting of an internal medium pipeline (working steel pipe), an intermediate rigid polyurethane foam layer (insulation layer) and a high-density polyethylene outer protective layer (outer protective pipe).

[0003] Existing polyurethane steel pipe elbows are usually bent by bending machines. When the diameter of the polyurethane steel pipe elbow is large, such as when the cross-sectional diameter of the steel pipe elbow is not less than 1 meter, the existing bending machines will not be applicable. Utility Model Content

[0004] In order to be able to bend large steel pipes, the present application provides a processing device for polyurethane elbow pipes.

[0005] The polyurethane elbow pipe processing equipment provided in this application adopts the following technical solution:

[0006] A processing device for a polyurethane elbow pipe comprises a positioning die, on which a through hole for a steel pipe to pass is opened; a plurality of rotating rods are rotatably connected to the inner wall of the through hole, and a heating coil is arranged at the port of the through hole.

[0007] A further technical solution is that the device also includes a rotary arm and a chuck; one end of the rotary arm is rotatably connected to the positioning mold, and the chuck is arranged on the rotary arm; the chuck includes an upper clamping block and a lower clamping block hinged to each other, and the upper clamping block and the lower clamping block are provided with opposite and semicircular through grooves.

[0008] A further technical solution is that a guide rail is provided on the positioning mold, a slider is slidably connected to the guide rail, and the rotary arm is rotatably connected to the slider;

[0009] The chuck is slidably arranged on the rotary arm, a lead screw is rotatably arranged on the rotary arm, and a screw hole threadably connected to the lead screw is arranged on the chuck.

[0010] A further technical solution is that a supporting wheel is provided at the lower part of the swing arm.

[0011] A further technical solution is that a water spray ring pipe is provided on the positioning mold.

[0012] This application has the following beneficial technical effects:

[0013] When the straight steel pipe passes through the through hole on the positioning mold, the rotating rod in the through hole is used to reduce the friction between the steel pipe and the inner wall of the through hole to prevent the steel pipe from breaking due to excessive friction; the heating coil at the through hole port heats the straight steel pipe, which softens after being heated. The steel pipe can be bent into an arc while being pulled out of the positioning mold, thereby realizing the bending of large steel pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0015] Figure 2 It is a partial structural diagram of an embodiment of the present application.

[0016] Figure numerals: 11, positioning mold; 12, through hole; 13, rotating rod; 14, heating coil; 15, water spray ring pipe; 2, rotary arm; 21, upper clamping block; 22, lower clamping block; 23, through groove; 24, fixing plate; 31, guide rail; 32, slider; 41, screw rod; 42, guide rod; 43, convex plate; 44, first motor; 51, support wheel; 52, second motor. DETAILED DESCRIPTION

[0017] The technical solution in this application is further described in detail below in conjunction with the accompanying drawings.

[0018] The present application embodiment discloses a polyurethane elbow pipe processing equipment. Figure 1 The device includes a positioning mold 11, on which a through hole 12 for the steel pipe to pass through is opened; a plurality of rotating rollers 13 are rotatably connected to the inner wall of the through hole 12, and a heating coil 14 is arranged at the port of the through hole 12.

[0019] Among them, the rotating roller protrudes to the inner wall of the through hole 12 to bear the weight of the steel pipe, and multiple rotating rods 13 are arranged around the inner wall of the through hole 12 to prevent the steel pipe from contacting and rubbing against the side wall of the through hole 12. The heating coil 14 is connected to a power supply. It uses the principle of electromagnetic induction to generate a magnetic field in the coil through the alternating current to induce current in the metal material, thereby generating heat to achieve the purpose of heating. Usually, the heating coil 14 can heat the steel pipe to 1000℃~1500℃, so that the steel pipe can be softened to achieve bending.

[0020] Since the heating coil 14 is arranged at the outer end of the through hole 12 , the heating coil 14 only heats the steel pipe in the coil, that is, the heated steel pipe immediately leaves the through hole 12 , so the high-temperature steel pipe will not affect the rotating roller 13 .

[0021] Furthermore, the device also includes a rotary arm 2 and a chuck; one end of the rotary arm 2 is rotatably connected to the positioning mold 11, and the chuck is arranged on the rotary arm 2; the chuck includes an upper clamp block 21 and a lower clamp block 22, and the upper clamp block 21 and the lower clamp block 22 are provided with opposite and semicircular through grooves 23. The sides of the upper clamp block 21 and the lower clamp block 22 away from the hinge axis are fixedly connected with a fixing plate 24, and the fixing plate 24 is provided with a screw hole for passing a bolt to fix the upper clamp block 21 and the lower clamp block 22.

[0022] The steel pipe is passed through the through hole 12 of the positioning mold 11, and the end of the steel pipe is placed in the through groove 23 between the upper clamp block 21 and the lower clamp block 22. The upper clamp block 21 and the lower clamp block 22 are closed to squeeze and fix the steel pipe. After the heating coil 14 heats the steel pipe, the rotary arm 2 is rotated to pull the steel pipe out of the positioning mold 11 and bend it into an arc structure.

[0023] Reference Figure 1 The outer side surface of the positioning mold 11 is provided with a guide rail 31, a slider 32 is slidably connected to the guide rail 31, and the swing arm 2 is rotatably connected to the slider 32. The chuck is slidably arranged on the swing arm 2, specifically, two convex plates 43 are fixedly arranged on the upper part of the swing arm 2, two parallel guide rods 42 are fixedly connected to the convex plates 43, a lead screw 41 parallel to the guide rod 42 is rotatably connected to the convex plates 43, two through holes 12 are provided on the lower clamping block 22, and the lower clamping block 22 is provided with a screw hole and is threadedly connected to the lead screw 41.

[0024] A first motor 44 is fixedly provided on the swing arm 2 for driving the screw 41 to rotate. The output shaft of the motor can be coaxially fixedly connected with the screw 41, or can output a rotational force to the screw 41 through a gear meshing connection.

[0025] When the slider 32 and the chuck are both close to the through hole 12, the chuck can bend the steel pipe to a larger angle after pulling it out under the rotation of the swing arm 2, that is, the bending amplitude of the steel pipe is larger; when the slider 32 and the chuck are both far away from the through hole 12, the chuck can bend the steel pipe to a smaller angle after pulling it out under the rotation of the swing arm 2, that is, the bending amplitude of the steel pipe is smaller, and the bending part of the steel pipe is smoother. In this way, the steel pipe can be bent into different bending amplitudes according to needs.

[0026] Reference Figure 2 A support wheel 51 and a second motor 52 are provided at the lower part of the swing arm 2, and the second motor 52 is used to drive the support wheel 51 to rotate.

[0027] Specifically, the support wheel 51 and the second motor 52 are both arranged at the lower part of the swing arm 2 and supported on the ground by the support wheel 51 to prevent the end of the swing arm 2 away from the rotating shaft from being suspended in the air and causing the rotating shaft to be subjected to a large radial force. The second motor 52 is a low-speed motor. When the second motor 52 is started, the support wheel 51 can be driven to rotate. When the support wheel 51 moves, the swing arm 2 can be driven to rotate to bend the steel pipe.

[0028] Furthermore, a water spray ring 15 is provided on the positioning mold 11. The water spray ring 15 is provided on the outer side of the positioning mold 11, and the axis of the water spray ring 15 coincides with the axis of the through hole 12. The water spray ring 15 is provided with a plurality of water spray ports arranged at equal intervals, which are used to cool the outer periphery of the steel pipe as a whole. The steel pipe is bent only by the high temperature softening near the heating coil 14, so that the overall softening of the steel pipe due to the high temperature causes deformation and prevents accidents caused by the high temperature of the steel pipe.

[0029] It should be noted that all directional indications (such as up, down, left, right, front and back) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "setting", etc. should be understood in a broad sense. For example, "setting" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A processing equipment for polyurethane elbow pipe, Features: The invention comprises a positioning mold (11), wherein a through hole (12) for allowing a steel pipe to pass through is provided on the positioning mold (11); a plurality of rotating rods (13) are rotatably connected to the inner wall of the through hole (12), and a heating coil (14) is provided at the port of the through hole (12).

2. A polyurethane elbow pipe processing equipment according to claim 1, Features: The device also comprises a rotary arm (2) and a chuck; one end of the rotary arm (2) is rotatably connected to the positioning mold (11), and the chuck is arranged on the rotary arm (2); the chuck comprises an upper clamping block (21) and a lower clamping block (22) which are hinged to each other, and the upper clamping block (21) and the lower clamping block (22) are provided with opposite and semicircular through grooves (23).

3. A polyurethane elbow pipe processing equipment according to claim 2, Features: The positioning mold (11) is provided with a guide rail (31), a slider (32) is slidably connected to the guide rail (31), and the rotary arm (2) is rotatably connected to the slider (32); The chuck is slidably arranged on the rotary arm (2), a lead screw is rotatably arranged on the rotary arm (2), and a screw hole threadably connected to the lead screw is arranged on the chuck.

4. A polyurethane elbow pipe processing equipment according to claim 3, Features: A supporting wheel (51) is provided at the lower part of the rotary arm (2).

5. The processing equipment for polyurethane elbow pipe according to claim 4, Features: The positioning mold (11) is provided with a water spray ring pipe (15).

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