Pipe expander capable of improving thermoplasticity

Abstract

The utility model provides a pipe expander capable of improving thermoplasticity, which relates to the technical field of pipe expanders and comprises a pipe expander main body, an expansion shell is arranged on one side of the pipe expander main body, an expansion rod is arranged in the middle of the expansion shell, a damping block is arranged on one side of the expansion rod, movable grooves are arranged on the outer surface of the expansion shell in a circumferential array mode, and expansion beads are arranged in the movable grooves. During use, the protective shell is screwed off from the expansion shell by rotating the protective shell, and when the protective shell is detached, a power supply is connected to the conductive slip ring, so that the mains supply is conveyed into the heating coil through a circuit after passing through the conductive slip ring, and the heating coil is electrified for heating; the expansion rod and the expansion shell are inserted into the pipeline, the pipeline is heated by the heating coil on the expansion shell, so that the thermoplasticity of the pipeline is improved, and the problem that the thermoplasticity of the pipeline cannot be improved by heating the pipeline during plastic deformation of the pipeline is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe expander technical field especially relates to a kind of can improve the pipe expander of thermoplasticity. BACKGROUND

[0002] According to the Chinese publication (announcement) No.CN102101142A discloses a kind of five-pearl precision deep hole pipe expander, including expansion rod, expansion shell connected on expansion rod, expansion bead is loaded into expansion shell inside, a slender expansion rod is connected in the inner cavity of expansion rod, the slender expansion rod is telescopic along the inner cavity of upper expansion rod, the number of the expansion bead is five.In the thin-walled pipe of heat exchanger on expansion joint nuclear power equipment or the fast and accurate pipe expansion on the high composite pipe plate, stainless steel plate, due to the small inner diameter of pipe, the inside of hole is deeper, the slender expansion rod can be stretched along the inside of expansion rod, when expansion joint pipe mouth, the expansion bead in expansion shell is five, the inner diameter of pipe is round, smooth, high precision after expansion.

[0003] The above-mentioned technology and pipe expansion process of prior art rely on mechanical force to make plastic deformation of pipe material, realize the connection with pipe plate.However, this way can cause the rupture of pipeline in the pipe expansion process, cannot heat the pipeline when the plastic deformation of pipeline to improve the thermal plasticity of pipeline. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problem that the pipeline cannot be heated when the plastic deformation of pipeline to improve the thermal plasticity of pipeline in prior art, and provides a kind of pipe expander that can improve the thermal plasticity.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a kind of pipe expander that can improve the thermal plasticity, including expansion pipe expander main part, the side of expansion pipe expander main part is equipped with expansion shell, the middle of expansion shell is equipped with expansion rod, the side of expansion rod is equipped with damping block, the outer surface of expansion shell is equipped with movable slot in array, the inside of movable slot is equipped with expansion bead, the side of the partition of expansion shell is equipped with sleeve, the outside of sleeve is equipped with electrically conductive slip ring, the side of movable slot away from partition is equipped with mounting groove, the outer surface of mounting groove is equipped with heating coil around, the side of heating coil away from movable slot is equipped with protective housing.

[0006] Preferably, the expansion rod is installed on the expansion pipe expander main body, and the expansion rod is inserted with the expansion pipe expander main body.

[0007] Preferably, the damping block is installed at the end of the expansion rod, and the damping block is screwed with the expansion rod.

[0008] Preferably, the expansion shell, the partition and the sleeve are integrally formed, and the expansion rod penetrates the expansion shell, the partition and the sleeve.

[0009] Preferably, the conductive slip ring is sleeved with the sleeve, and the conductive slip ring is bolted with the partition plate.

[0010] Preferably, the protective shell is installed in the installation groove of the expansion shell, and the protective shell is threadedly connected with the expansion shell.

[0011] Preferably, the heating coil is electrically connected with the conductive slip ring.

[0012] Advantages

[0013] In the utility model, when using, the protective shell is screwed off from the expansion shell by rotating the protective shell, when the protective shell is removed, the conductive slip ring is connected with the power supply, the commercial power is transmitted into the heating coil through the conductive slip ring, the heating coil is electrified and heated, when the heating coil is heated, the expansion rod and the expansion shell are inserted into the pipeline, the heating coil on the expansion shell heats the pipeline, and the pipeline is heated to improve the thermoplasticity. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an isometric view of the utility model;

[0015] Figure 2 It is a partial isometric view of the utility model;

[0016] Figure 3 It is a partial front view of the utility model;

[0017] Figure 4 It is a partial front view of the utility model; Figure 3 It is a sectional view of A-A of the utility model.

[0018] Legend:

[0019] 1, expansion tube main body;2, expansion rod;3, damping block;4, expansion shell;5, movable groove;6, expansion bead;7, installation groove;8, heating coil;9, protective shell;10, partition plate;11, sleeve;12, conductive slip ring. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] The specific embodiments of the utility model are described below in combination with the drawings. Embodiment one:

[0023] Reference Figures 1-4 The utility model discloses a can improve the tuber expander of thermoplasticity, including expander body 1, one side of expander body 1 is equipped with expansion shell 4, the middle part of expansion shell 4 is equipped with expansion rod 2, one side of expansion rod 2 is equipped with damping block 3, the outer surface circumferential array of expansion shell 4 is equipped with movable slot 5, the inside of movable slot 5 is equipped with expansion bead 6 all, the side of expansion shell 4 is equipped with baffle 10, the side of baffle 10 away from expansion shell 4 is equipped with sleeve 11, the outside of sleeve 11 is equipped with electrically conductive slip ring 12, the side of movable slot 5 away from baffle 10 is equipped with mounting groove 7, the outer surface of mounting groove 7 is surrounded with heating coil 8, the side of heating coil 8 away from movable slot 5 is equipped with protective housing 9, expansion rod 2 is installed on expander body 1, and expansion rod 2 is inserted with expander body 1, damping block 3 is installed at the end of expansion rod 2, and damping block 3 is connected with expansion rod 2 by screw thread, expansion shell 4, baffle 10 and sleeve 11 are integrally formed, and expansion rod 2 penetrates expansion shell 4, baffle 10 and sleeve 11, electrically conductive slip ring 12 is sleeved with sleeve 11, and electrically conductive slip ring 12 is connected with baffle 10 by bolt, protective housing 9 is installed in the mounting groove 7 of expansion shell 4, and protective housing 9 is connected with expansion shell 4 by screw thread, and heating coil 8 is connected with electrically conductive slip ring 12 electrically.

[0024] The existing deep pipe expander body 1 is internally provided with a driving motor, which drives the inserted expander rod 2 to rotate, providing power source for the expansion operation. At the same time, in the later stage of expansion, pressure is applied to the expander rod 2 and the expander shell 4 to push the expansion process to completion. The expander rod 2 is conical and is inserted into the expander body 1. When the expander body 1 drives its rotation, it is pushed along the pipe axis direction by the transmission component. After the expander body 1 is pressed, the expander beads 6 in the movable groove 5 of the expander shell 4 are extruded, so that the expander beads 6 generate radial pressure on the inner wall of the pipe. The damping block 3 is installed at the end of the expander rod 2 and is screwed with the expander rod 2. Its function is to block the falling of the expander shell 4. The expander shell 4 is provided with a passage for accommodating the expander rod 2 in the middle, and the outer surface is circumferentially provided with movable grooves 5. The expander shell 4 enters the pipe along with the expander rod 2, and the movable grooves 5 are used to accommodate the expander beads 6, which limit the movement direction of the expander beads 6 when the expander rod 2 extrudes the expander beads 6, so that the expander beads 6 can only exert pressure on the inner wall of the pipe in the radial direction. The movable groove 5 is the active space of the expander bead 6, which provides a path for the expander bead 6 to roll outward and extrude the inner wall of the pipe, ensuring the smooth progress of the expansion operation. The expander bead 6 is installed in the movable groove 5 and rolls outward in the movable groove 5 under the extrusion of the expander rod 2, generating radial pressure on the inner wall of the pipe, causing plastic deformation of the pipe, realizing the increase of the pipe diameter and the close fit of the pipe plate and other connecting parts. The partition plate 10 is integrally formed with the expander shell 4 and the sleeve 11, and plays a partitioning and supporting role. The sleeve 11 is externally sleeved with the conductive slip ring 12 to provide an installation carrier for the conductive slip ring 12 and enable the conductive slip ring 12 to stably rotate around the expander shell 4, ensuring the stability of the circuit connection. The conductive slip ring 12 is sleeved with the sleeve 11 and bolted with the partition plate 10, which can maintain the continuity of the circuit in the rotating state. By connecting to the mains, current is transmitted to the heating coil 8, which can continuously supply power to the heating coil 8 even when the expander body 1 is rotating. The installation groove 7 is provided on the expander shell 4 for installing the heating coil 8, determining the position of the heating coil 8 so that it can accurately heat the pipe. The heating coil 8 surrounds the installation groove 7 installed on the outer surface of the installation groove 7 and is electrically connected with the conductive slip ring 12. After being electrified, it generates heat to heat the pipe, improves the thermal plasticity of the pipe, facilitates the subsequent expansion operation, and makes the pipe more easily deformed plastically. The protective shell 9 is installed in the installation groove 7 of the expander shell 4 and is screwed with the expander shell 4. When the heating function is not used, it protects the heating coil 8 from being damaged; when used, it is unscrewed to expose the heating coil 8 so that it can work normally. Specific embodiment two:

[0026] Reference Figures 1-4A kind of can improve the pipe expander of thermoplasticity, further based on the basic structure in specific embodiment one, when using, before carrying out pipe expansion operation, first rotate the shell 9 and be twisted from the expansion shell 4, then for the power supply of conductive slip ring 12, commercial power is transmitted to heating coil 8 by conductive slip ring 12 and makes it power heating.At this time, expansion rod 2 and expansion shell 4 are inserted into pipe, heating coil 8 carries out heating to pipe, improves the thermoplasticity of pipe.

[0027] Then, drive pipe expander body 1, internal drive device drives expansion rod 2 rotation, while under the action of transmission component, expansion rod 2 and expansion shell 4 slowly penetrate into pipe along the axial direction of pipe, reach predetermined expansion joint position.Subsequently continue to push pipe expander body 1, press expansion rod 2 and expansion shell 4, expansion rod 2 extrudes expansion bead 6 in the movable slot 5 of expansion shell 4, expansion bead 6 rolls outward and generates radial pressure to the inner wall of pipe material, so that pipe material occurs plastic deformation on the basis of improved thermoplasticity, pipe diameter increases and is closely combined with pipe plate and other connecting pieces, and finally completes expansion joint process.

[0028] As described above,

[0029] 1, when using, by rotating the shell 9, the shell 9 is twisted from the expansion shell 4, when the shell 9 is removed, the power supply is connected for the conductive slip ring 12, so that the commercial power is transmitted into heating coil 8 through the line after the conductive slip ring 12, so that the heating coil 8 is powered and heated, when the heating coil 8 is heated, the expansion rod 2 and the expansion shell 4 are inserted into the pipe, so that the heating coil 8 on the expansion shell 4 heats the pipe, so that the pipe is heated to improve the thermoplasticity, which solves the problem that the pipe cannot be heated to improve the thermoplasticity of the pipe when the pipe is plastic deformed.

[0030] In the utility model, unless another definite provision and limitation, first feature is in the "on" or "under" of second feature, can include that first and second features are directly contacted, also can include that first and second features are not directly contacted but are contacted through other features between them.Moreover, first feature is in the "on", "upper" and "upper surface" of second feature, includes that first feature is directly above and obliquely above second feature, or just indicates that the horizontal height of first feature is higher than second feature.The first feature is in the "under", "lower" and "lower surface" of the second feature, includes that the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0031] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A tube expander capable of improving thermal plasticity, comprising a tube expander main body (1), characterized in that: The side of the expander body (1) is provided with an expansion shell (4), the middle of the expansion shell (4) is provided with an expansion rod (2), one side of the expansion rod (2) is provided with a damping block (3), the outer surface of the expansion shell (4) is circumferentially provided with a movable groove (5), the inside of the movable groove (5) is provided with an expansion bead (6), the side of the expansion shell (4) is provided with a partition plate (10), the side of the partition plate (10) away from the expansion shell (4) is provided with a sleeve (11), the outside of the sleeve (11) is provided with a conductive slip ring (12), the side of the movable groove (5) away from the partition plate (10) is provided with a mounting groove (7), the outer surface of the mounting groove (7) is provided with a heating coil (8), the side of the heating coil (8) away from the movable groove (5) is provided with a protective shell (9).

2. The expandable tube with improved thermoplasticity according to claim 1, wherein: The expansion rod (2) is installed on the expander body (1), and the expansion rod (2) is inserted with the expander body (1).

3. The expandable tubular with improved thermoplasticity of claim 1, wherein: The damping block (3) is installed at the end of the expansion rod (2), and the damping block (3) is threadedly connected with the expansion rod (2).

4. The expandable tubular of claim 1, wherein: The expansion shell (4), the partition plate (10) and the sleeve (11) are integrally formed, and the expansion rod (2) penetrates the expansion shell (4), the partition plate (10) and the sleeve (11).

5. The expandable tubular of claim 1, wherein: The conductive slip ring (12) is sleeved with the sleeve (11), and the conductive slip ring (12) is bolted with the partition plate (10).

6. The expandable tubular with improved thermoplasticity of claim 1, wherein: The protective shell (9) is installed in the mounting groove (7) of the expansion shell (4), and the protective shell (9) is threadedly connected with the expansion shell (4).

7. The expandable tubular of claim 1, wherein: The heating coil (8) is electrically connected with the conductive slip ring (12).

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