A special hole-drawing apparatus for thick-walled pipes

Abstract

The utility model discloses a special hole drawing equipment for thick wall pipe fitting, including bottom frame, hole drawing mechanism and component hoop. Component hoop detachable installation is in on bottom frame, is used for fixing the component of waiting for processing, hole drawing mechanism includes the hole drawing device that is composed of mould, hydraulic jack and jack mounting plate, and hydraulic jack is fixed in the top of bottom frame through mounting plate, hole drawing machine frame, and mould is connected with the output shaft of jack, and the hole mouth forms the circular arc transition after hole drawing. Bottom frame adopts galvanized square tube to make, and is equipped with the uniformly distributed mounting hole and is adapted to different specifications components, component hoop contains rubber U type card, avoids damaging pipe fitting, and hole drawing machine frame assembly can slide and lock tightly, and the position is adjusted conveniently. The equipment has strong adaptability, and the hole mouth quality is high, and the operation is convenient, is applicable to the high accuracy hole drawing of thick wall pipe fitting, satisfies the strict requirement of food hygiene etc.

Description

Technical Field

[0001] This utility model relates to a special hole-pulling device for thick-walled pipe fittings. Background Technology

[0002] In industrial production, the drilling of thick-walled pipes (such as membrane modules and chemical equipment cylinders) is a critical processing step, and conventional processing methods have many drawbacks: If the "direct drilling + welding pipe" process is adopted, the high temperature during the welding process will cause local thermal deformation of the pipe fittings, which will disrupt the original stress balance. In addition, welding slag and impurities are easy to remain at the weld, making it difficult to meet the cleanliness requirements of food hygiene and other fields.

[0003] Furthermore, the quality of the orifice of thick-walled tubing directly affects the sealing performance and structural strength of subsequent assembly. For example, in the fabrication of membrane modules, sharp edges or micro-cracks in the orifice can impair the seal and affect filtration efficiency.

[0004] Therefore, given the structural characteristics of thick-walled pipe fittings, developing a specialized hole-pulling device that can achieve a smooth transition at the orifice, adapt to various pipe fitting specifications, and is easy to operate has become an urgent technical problem to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies in the extraction of holes for thick-walled pipe fittings, such as poor hole quality, low adaptability, and cumbersome operation, and to provide a special extraction device for thick-walled pipe fittings.

[0006] A special hole-pulling device for thick-walled pipe fittings includes a base frame, a hole-pulling mechanism, and a component clamp; the component clamp is detachably installed on the base frame to fix the thick-walled pipe fitting component to be processed; the surface of the component is provided with a pre-drilled through hole, through which the hole-pulling mechanism passes and processes an arc transition.

[0007] The hole-pulling mechanism includes a hole-pulling frame and a hole-pulling device. The hole-pulling device consists of a mold, a hydraulic jack, and a jack mounting plate. The hydraulic jack is fixed to the hole-pulling frame via the jack mounting plate. The mold is connected to the output shaft of the hydraulic jack for hole-pulling operations on the component, and the hole opening of the component forms an arc transition after hole-pulling.

[0008] Furthermore, the base frame is welded from square tubing, and its upper surface has mounting holes evenly distributed along its length. The component clamp engages with one set of mounting holes via bolts. The evenly distributed mounting holes enable the equipment to adapt to components of different lengths, significantly improving its structural stability and versatility, and meeting the fixing requirements of thick-walled pipe fittings of different specifications.

[0009] Furthermore, the inner side of the component clamp is provided with a rubber pad, and the locking component of the component clamp is an adjusting bolt that passes through the clamp body, used to tighten the clamp body to fix the component. The rubber pad serves to protect the appearance of the component, while using the friction of the rubber to enhance the tightness of the fit between the clamp and the component.

[0010] Furthermore, the hole-pulling frame is slidably connected to the base frame, and a locking device is provided on the hole-pulling frame for fixing it after the position of the hole-pulling frame is adjusted. This connection method allows the hole-pulling frame to move freely along the length of the base frame, thereby allowing the working position of the hole-pulling mechanism to be adjusted according to the position of the pre-through hole on the component to be processed.

[0011] Furthermore, the mold has a conical structure and is made of cemented carbide. The top of the mold is the large-diameter end, and the connection between the mold and the output shaft of the hydraulic jack is detachable. The conical design allows the deformation of the component material during the hole-pulling process to gradually unfold along the conical surface, avoiding local stress concentration that could lead to wrinkles or cracks at the hole opening.

[0012] Furthermore, the jack mounting plate is made of metal sheet, which is fixed to the hole-pulling machine frame by welding or bolting. The metal sheet has high strength and rigidity, and can withstand the axial force generated when the hydraulic jack is working.

[0013] Furthermore, the radius of the arc transition is 2-5mm.

[0014] Furthermore, the rubber pad has a thickness of 3-8 mm, and its surface is provided with anti-slip texture. This size range is designed based on the wall thickness and stress characteristics of thick-walled pipe fittings, which can both avoid sharp edges at the orifice and ensure the structural strength of the orifice. Beneficial effects

[0015] This device effectively solves the problems of burrs, tearing, deformation, and cumbersome subsequent grinding in traditional drilling and welding processes by combining "pre-drilled holes + conical mold hole extraction". It makes the hole opening form a smooth arc transition with a radius of 2-5mm and a surface roughness of ≤1.6μm. It can meet the stringent hygiene requirements of food, medicine and other fields without additional treatment.

[0016] Secondly, this equipment is highly adaptable. The bottom frame is made of square tube welded and has mounting holes evenly distributed along the length. The component clamps can be flexibly adjusted in position by bolts and mounting holes to adapt to the processing needs of components of different specifications. The hole-pulling frame is slidably connected to the bottom frame and equipped with locking parts, which can accurately adjust the hole-pulling position to meet the processing needs of multiple holes.

[0017] Finally, a conical mold design was adopted, which has excellent wear resistance and can be detachably connected to the jack output shaft, making it easy to replace molds of different specifications to improve versatility. At the same time, the quality of the hole after drilling is also better, and the whole process achieves high-quality drilling operation for thick-walled pipes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a specialized hole-pulling device for thick-walled pipe fittings; Figure 2 This is a schematic diagram of the hole-pulling device in a special hole-pulling equipment for thick-walled pipe fittings; Figure 3 This is a schematic diagram showing the effect after the hole is removed; In the diagram: 1. Base frame, 2. Hole-pulling machine frame, 3. Component clamp, 4. Component, 5. Hole-pulling device, 51. Mold, 52. Hydraulic jack, 53. Jack mounting plate, 6. Arc transition. Detailed Implementation

[0019] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model. Example

[0020] like Figures 1-2 As shown, a special hole-pulling device for thick-walled pipe fittings includes a base frame 1, a hole-pulling mechanism (including a hole-pulling frame 2 and a hole-pulling device 5), and a component clamp 3.

[0021] The base frame 1 is constructed from square tubing welded into a rectangular frame, which is then leveled. Several mounting holes are evenly distributed along its length, and M16 adjustable support feet are installed at the four corners of the bottom to adjust the levelness. Two component clamps 3 are attached, both connected to the mounting holes in the base frame 1 via bolts. The clamp body has a U-shaped structure with a rubber pad bonded to the inside. The surface of the rubber pad has a diamond-shaped anti-slip pattern. Adjusting bolts pass through both side walls, and the ends have round handles for securing component 4.

[0022] The hole-pulling machine frame 2 is a sliding frame welded from square tubes. The hydraulic jack 52 is fixed to the jack mounting plate 53 by bolts. The mold 51 is a YG10 tungsten steel alloy conical structure and is connected to the force-bearing shaft of the hydraulic jack 52.

[0023] Hole pulling operation process: S1. Fixing the component: Place the component to be processed inside the component clamp, tighten the adjusting bolts to ensure that the rubber pad fits tightly against the component surface and that the component is not loose.

[0024] S2. Adjust the hole-pulling position: Push the hole-pulling frame to align the mold with the pre-through hole of the component, and lock the handle to fix the hole-pulling frame.

[0025] S3. Hole-pulling operation: The operator passes through the pre-through hole and installs the selected mold. Then, the manual pump is operated to make the mold pass through the pre-through hole at a uniform speed and squeeze the hole opening until the hole opening forms a circular arc transition with R=3mm.

[0026] This equipment features high-quality orifices, strong adaptability, and convenient operation. It is suitable for high-precision drilling of thick-walled pipes and meets high hygiene requirements.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A special hole-drawing device for thick-walled pipe fittings, characterized in that, It includes a base frame (1), a hole-pulling mechanism and a component clamp (3); the component clamp (3) is detachably installed on the base frame (1) and is used to fix the thick-walled pipe component (4) to be processed. The surface of component (4) is provided with a pre-drilled through hole, through which the hole-pulling mechanism passes and machines an arc transition (6). The hole-pulling mechanism includes a hole-pulling frame (2) and a hole-pulling device (5). The hole-pulling device (5) consists of a mold (51), a hydraulic jack (52), and a jack mounting plate (53). The hydraulic jack (52) is fixed on the hole-pulling frame (2) through the jack mounting plate (53). The mold (51) is connected to the output shaft of the hydraulic jack (52) for hole-pulling operation on the component (4). After hole-pulling, the hole opening of the component (4) forms an arc transition (6).

2. The special hole-drawing device for thick-walled pipe fittings according to claim 1, characterized in that, The bottom frame (1) is made of square tube welded together. The upper surface of the bottom frame (1) is provided with mounting holes evenly distributed along the length direction. The component clamp (3) is engaged with one of the mounting holes by bolts.

3. A special hole-drawing device for thick-walled pipe fittings according to claim 1, characterized in that, The inner side of the component clamp (3) is provided with a rubber pad, and the locking component of the component clamp (3) is an adjusting bolt that passes through the clamp body, which is used to tighten the clamp body to fix the component (4).

4. A special hole-drawing device for thick-walled pipe fittings according to any one of claims 1-3, characterized in that, The hole-pulling frame (2) is slidably connected to the bottom frame (1), and the hole-pulling frame (2) is provided with a locking component for fixing the hole-pulling frame (2) after the position is adjusted.

5. A special hole-drawing device for thick-walled pipe fittings according to claim 4, characterized in that, The mold (51) has a conical structure and is made of hard alloy. The top of the mold (51) is the large diameter end. The connection between the mold (51) and the output shaft of the hydraulic jack (52) is a detachable connection.

6. A special hole-drawing device for thick-walled pipe fittings according to claim 4, characterized in that, The jack mounting plate (53) is a metal plate, which is fixed to the hole-pulling machine frame (2) by welding or bolting.

7. A special hole-drawing device for thick-walled pipe fittings according to claim 4, characterized in that, The radius of the circular arc transition (6) is 2-5 mm.

8. A special hole-drawing device for thick-walled pipe fittings according to claim 3, characterized in that, The rubber pad has a thickness of 3-8mm and its surface has anti-slip texture.

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