Composite pipe end expanding device

Abstract

The utility model relates to the technical field of composite pipe machining, and particularly discloses a composite pipe end expanding device which comprises a placing frame, a placing groove is formed in the top end of the placing frame, a lower pressing plate is installed on one side of the placing groove in the top end of the placing frame, and an expanding equipment body is fixed to the other side of the placing groove in the top end of the placing frame. An expansion head penetrates out of the front end of the expansion equipment main body, and a limiting mechanism is arranged on one side of the expansion head; the limiting mechanism comprises a rectangular block, the rectangular block penetrates out of one side of the outer wall of the expansion head, a hydraulic rod is embedded in the end, away from the expansion head, of the rectangular block, and the expansion head is embedded with an electromagnet so that the expansion head and the limiting mechanism can be rapidly disassembled and assembled, and therefore the composite pipe can be placed and taken, and the composite pipe is limited through the hydraulic rod, a connecting rod and a limiting rod; and meanwhile, the mounting block and the roller are matched, so that the composite pipe is transversely clamped and limited, and the situation that the expansion work is affected due to shaking caused by excessive friction is avoided.

Description

Technical Field

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

[0002] Composite pipes, especially steel-plastic composite pipes, are widely used in industry and mining as well as daily life due to their good corrosion resistance, impact resistance and high tensile strength. In the installation of pipelines in water supply and drainage, gas supply, chemical industry, thermal power and other systems, it is usually necessary to directly connect the composite pipes of full diameter (such as aluminum-plastic composite pipes, which include plastic layers on the inner and outer surfaces and an aluminum layer in the middle) to the pipe fittings (joints). Therefore, it is necessary to expand the end of the composite pipe through an expansion device according to the specific construction conditions.

[0003] In the prior art, the expansion device is expanded by expanding the bag. However, when the composite tube is expanded by pressure inflation, it needs to be preheated and sufficient gas pressure is required, which may cause the bag to rupture.

[0004] The existing patent (publication number: CN215315210U) discloses a steel-plastic composite pipe end expansion device. The end to be expanded is aligned with the installation column, the composite pipe is pressed against the machine body A, the installation column is extended into the composite pipe, the placement tube and the expansion tube are pressed down by hand to fit the composite pipe, and the handle is held by hand to rotate the threaded rod so that the threaded rod is turned into the threaded hole until the composite pipe is fixed.

[0005] In response to the above problems, although the solution provided by the existing patent can expand the composite pipe end through the cooperation of components such as mounting columns, a certain force is applied during the expansion process. If it is only covered from above for vertical fixation, the limit fixation may not be complete, causing the composite pipe to move laterally, thereby affecting the quality of the expansion. Summary of the invention

[0006] The purpose of the utility model is to provide a composite pipe end expansion device, which can clamp and limit the composite pipe laterally while avoiding excessive friction and shaking, which affects the expansion work, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite pipe end expansion device, comprising a placement rack, a placement groove is provided at the top of the placement rack, and a lower pressing plate is installed on one side of the placement groove at the top of the placement rack, an expansion device body is fixed on the other side of the placement groove at the top of the placement rack, and an expansion head is passed through the front end of the expansion device body, and a limiting mechanism is provided on one side of the expansion head;

[0008] The limiting mechanism includes a rectangular block, which passes through one side of the outer wall of the expansion head, and a hydraulic rod is embedded in the end of the rectangular block away from the expansion head, the power output end of the hydraulic rod is connected to a connecting rod, and a limiting rod is installed on the end of the connecting rod away from the hydraulic rod, the limiting rod is fixed with a mounting block on the outer wall facing the lower pressure plate, and a roller is rotatably connected between the two axes of the outer wall of the mounting block.

[0009] Preferably, the rectangular block is magnetically connected to the expansion head, and the rectangular block forms a rotating structure between the expansion head and the expansion device body.

[0010] Preferably, a motor is embedded at one end of the placement rack, a threaded rod is connected to the power output end of the motor, and one end of the threaded rod penetrates into the placement rack and is slidably connected to a slider.

[0011] Preferably, a support rod is inserted into another sliding block inside the placement rack, and a sliding groove is provided at a position corresponding to the sliding block at the top of the placement rack.

[0012] Preferably, the slider is threadedly connected to the threaded rod, and the slider forms a sliding structure with the placement rack through a sliding groove.

[0013] Preferably, a blocking mechanism is provided at the top of the placement groove, and the blocking mechanism includes a placement hole, the placement hole is opened on one side of the top of the placement groove, and a triangular block passes through the inside of the placement hole, a connecting block is fixed to one end of the triangular block passing through the placement hole, and a damping spring is embedded in the bottom end of the connecting block.

[0014] Preferably, the connection block forms an elastic structure with the placement frame through a damping spring, and a sliding structure is formed between the connection block and the placement hole.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The expansion head is embedded with an electromagnet to facilitate quick disassembly and assembly with the limit mechanism, so that the composite pipe can be placed and taken. The composite pipe is limited by the hydraulic rod, connecting rod and limit rod. At the same time, the installation block and the roller are used to clamp and limit the composite pipe horizontally, avoiding excessive friction and shaking, which will affect the expansion work;

[0017] 2. Through the cooperation of the motor, threaded rod and slider, the position of the expansion device body is adjusted to adjust the expansion depth of the composite pipe. The support rod and the slide groove are used to maintain the stability when moving from the expansion device body. When the expansion device body is misaligned with the placement hole, the triangular block, the connecting block and the damping spring are used to limit the composite pipe. The limiting mechanism is used to completely clamp and limit the composite pipe in the horizontal direction to avoid shaking. At the same time, the triangular block is convenient for compressing the connecting block and the damping spring when the expansion device body is reset to avoid being unable to reset due to limitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is the overall structural view of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the expansion head of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the roller of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the connection block of the utility model.

[0023] Description of reference numerals:

[0024] 1. Placement rack; 2. Placement slot; 3. Lower pressure plate; 4. Expansion equipment body; 5. Expansion head; 6. Limiting mechanism; 601. Rectangular block; 602. Hydraulic rod; 603. Connecting rod; 604. Limiting rod; 605. Mounting block; 606. Roller; 7. Motor; 8. Threaded rod; 9. Slider; 10. Support rod; 11. Slide slot; 12. Blocking mechanism; 1201. Placement hole; 1202. Triangular block; 1203. Connecting block; 1204. Damping spring. DETAILED DESCRIPTION

[0025] 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.

[0026] The utility model provides a technical solution:

[0027] See also Figures 1 to 3A composite pipe end expansion device comprises a placement rack 1, a placement groove 2 is provided at the top of the placement rack 1, a lower pressure plate 3 is installed on one side of the placement groove 2 at the top of the placement rack 1, an expansion device body 4 is fixed on the other side of the placement groove 2 at the top of the placement rack 1, an expansion head 5 is passed through the front end of the expansion device body 4, and a limiting mechanism 6 is arranged on one side of the expansion head 5; the limiting mechanism 6 comprises a rectangular block 601, the rectangular block 601 passes through one side of the outer wall of the expansion head 5, a hydraulic rod 602 is embedded at one end of the rectangular block 601 away from the expansion head 5, a connecting rod 603 is connected to the power output end of the hydraulic rod 602, a limiting rod 604 is installed at one end of the connecting rod 603 away from the hydraulic rod 602, a mounting block 605 is fixed on the outer wall of the limiting rod 604 facing the lower pressure plate 3, a roller 606 is rotatably connected between the two axes of the outer wall of the mounting block 605, the rectangular block 601 is magnetically connected to the expansion head 5, and the rectangular block 601 forms a rotating structure between the expansion head 5 and the expansion device body 4.

[0028] By adopting the above technical scheme, firstly, the composite pipe is limited on the placement groove 2 of the placement rack 1 through the lower pressure plate 3 and the bolts, and it is pressed against the side of the expansion equipment body 4, and then the rectangular block 601 is quickly fixed through the electromagnet embedded in the reserved hole of the expansion head 5, so that the placement and retrieval of the composite pipe can be convenient. When the rectangular block 601 is fixed, it rotates with the expansion head 5, and at the same time, the hydraulic rod 602 drives the connecting rod 603 to allow the limiting rod 604 to clamp the composite pipe to avoid lateral displacement of the composite pipe during the expansion process. The composite pipe is rotated in contact with the mounting block 605 and the rotatably connected roller 606 to avoid shaking caused by excessive friction that affects the expansion of the composite pipe.

[0029] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, a motor 7 is embedded at one end of the placement rack 1, and a threaded rod 8 is connected to the power output end of the motor 7. The threaded rod 8 penetrates into one end of the placement rack 1 and is slidably connected to a slider 9. A support rod 10 is penetrated from another slider 9 inside the placement rack 1. A slide groove 11 is provided at the position of the top of the placement rack 1 corresponding to the slider 9. The slider 9 is threadedly connected to the threaded rod 8. The slider 9 and the placement rack 1 form a sliding structure through the slide groove 11. A blocking mechanism 12 is provided at the top of the placement groove 2. The blocking mechanism 12 includes a placement hole 1201. The placement hole 1201 is provided on one side of the top of the placement groove 2. A triangular block 1202 is penetrated from the placement hole 1201. A connecting block 1203 is fixed to one end of the triangular block 1202 that penetrates into the placement hole 1201. A damping spring 1204 is embedded at the bottom end of the connecting block 1203. The connecting block 1203 and the placement rack 1 form an elastic structure through the damping spring 1204, and a sliding structure is formed between the connecting block 1203 and the placement hole 1201.

[0030] By adopting the above technical solution, when the expansion depth needs to be adjusted, the composite pipe remains stationary and the motor 7 drives the threaded rod 8, allowing the slider 9 to slide under the support and guidance of the support rod 10 and the slide groove 11, thereby driving the expansion device body 4 to allow the expansion head 5 to adjust the depth inside the composite pipe, thereby improving the applicability of processing. When the expansion device body 4 slides along the placement groove 2, the placement hole 1201 is leaked, so that the triangular block 1202 is lifted by the connecting block 1203 and the damping spring 1204, and passes through the placement hole 1201 to limit the composite pipe. In conjunction with the limiting mechanism 6, the composite pipe can be clamped and limited laterally to avoid shaking and loosening during the expansion process.

[0031] Working principle: First, the composite pipe is fixed in the placement groove 2 of the placement frame 1 by bolts and the lower pressure plate 3. The composite pipe is placed outside the expansion head 5 and contacts the outside of the expansion equipment body 4. The expansion equipment body 4 is a conventional device (Chuanghong Machinery CH series). At the same time, the reserved hole opened in the main shaft of the expansion head 5 is embedded with an electromagnet, which is used for magnetic adsorption of the rectangular block 601 for easy disassembly and assembly. The hydraulic rod 602 is extended and retracted to allow the connecting rod 603 to drive the limit rod 604 to contact the composite pipe to prevent lateral movement. The installation block 605 fixed by the limit rod 604 rotates the connecting roller 606 to slide and contact the composite pipe. The pipes are closed to avoid excessive friction. When the expansion depth needs to be adjusted, the motor 7 drives the threaded rod 8 to allow the slider 9 to drive the expansion device body 4 to adjust the position. The support rod 10 and the slide groove 11 are cooperated to improve the movement stability of the expansion device body 4, and the contact surface depth between the expansion head 5 and the composite pipe is adjusted. When the expansion device body 4 moves, the triangular block 1202 is not restricted, and the connecting block 1203 is pushed by the damping spring 1204 to allow the triangular block 1202 to pass through the placement hole 1201, against one end of the composite pipe, and cooperate with the hydraulic rod 602 to contract to completely limit the composite pipe.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A composite pipe end expansion device, comprising a placement frame (1), characterized in that: The top of the placement rack (1) is provided with a placement groove (2), and a lower pressure plate (3) is installed on one side of the placement groove (2) at the top of the placement rack (1), and an expansion device body (4) is fixed on the other side of the placement groove (2) at the top of the placement rack (1), and an expansion head (5) is inserted through the front end of the expansion device body (4), and a limiting mechanism (6) is provided on one side of the expansion head (5); The limiting mechanism (6) comprises a rectangular block (601), the rectangular block (601) passes through one side of the outer wall of the expansion head (5), and a hydraulic rod (602) is embedded in the end of the rectangular block (601) away from the expansion head (5), the power output end of the hydraulic rod (602) is connected to a connecting rod (603), and a limiting rod (604) is installed at the end of the connecting rod (603) away from the hydraulic rod (602), the limiting rod (604) is fixed with a mounting block (605) facing the outer wall of the lower pressure plate (3), and a roller (606) is rotatably connected between two axial directions of the outer wall of the mounting block (605).

2. A composite pipe end expansion device according to claim 1, characterized in that: The rectangular block (601) is magnetically connected to the expansion head (5), and the rectangular block (601) forms a rotating structure through the expansion head (5) and the expansion device body (4).

3. The composite pipe end expansion device according to claim 1, characterized in that: A motor (7) is embedded at one end of the placement rack (1); a threaded rod (8) is connected to the power output end of the motor (7); and one end of the threaded rod (8) that penetrates into the placement rack (1) is slidably connected to a slider (9).

4. A composite pipe end expansion device according to claim 3, characterized in that: A support rod (10) is inserted into another sliding block (9) inside the placement rack (1), and a sliding groove (11) is provided at the top of the placement rack (1) at a position corresponding to the sliding block (9).

5. The composite pipe end expansion device according to claim 3, characterized in that: The slide block (9) is threadedly connected to the threaded rod (8), and the slide block (9) forms a sliding structure with the placement rack (1) through a sliding groove (11).

6. The composite pipe end expansion device according to claim 1, characterized in that: A blocking mechanism (12) is provided at the top of the placement groove (2), and the blocking mechanism (12) comprises a placement hole (1201). The placement hole (1201) is opened at one side of the top of the placement groove (2), and a triangular block (1202) is inserted into the placement hole (1201). A connecting block (1203) is fixed to one end of the triangular block (1202) that penetrates into the placement hole (1201), and a damping spring (1204) is embedded at the bottom end of the connecting block (1203).

7. A composite pipe end expansion device according to claim 6, characterized in that: The connection block (1203) forms an elastic structure with the placement rack (1) via a damping spring (1204), and a sliding structure is formed between the connection block (1203) and the placement hole (1201).

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