Embedded foreign matter prevention device for pipeline opening

Abstract

The utility model relates to the field of pipeline welding treatment, in particular to an embedded foreign matter prevention device for a pipeline opening, which comprises a sealing material, a clamping structure and a pressing structure, the clamping structure comprises an upper clamping piece, a lower clamping piece, an upper clamping piece hole and a lower clamping piece hole, the upper clamping piece hole is arranged on the upper clamping piece in a penetrating manner, and the lower clamping piece hole is arranged on the lower clamping piece in a penetrating manner. The upper clamping piece hole is formed in the upper clamping piece in a penetrating mode, the lower clamping piece hole is formed in the lower clamping piece in a penetrating mode, the upper clamping piece hole and the lower clamping piece hole are coaxially formed, the sealing material is arranged between the upper clamping piece and the lower clamping piece, and the pressing structure extrudes the upper clamping piece and the lower clamping piece oppositely. And the sealing material bulges towards the edges of the upper clamping piece and the lower clamping piece under the extrusion of the upper clamping piece and the lower clamping piece and is stacked on the inner wall of the pipeline. The sealing material is placed between the upper clamping piece and the lower clamping piece, and the upper clamping piece and the lower clamping piece are extruded, so that the sealing material protrudes out of the upper clamping piece and the lower clamping piece, the positions of the upper clamping piece and the lower clamping piece in the pipeline are fixed, and foreign matter is prevented from entering the pipeline opening in the process of cleaning the pipeline opening.

Description

Technical Field

[0001] The utility model relates to the field of pipeline welding processing, in particular to an embedded foreign body prevention device used at a pipeline opening. Background Art

[0002] During the installation of the heating surface of the boiler of the power station unit, the installation of the small steam and water pipes, and the installation of the small electric heating pipes, the installation of the heating surface and the small pipes is the top priority. The heating surface is usually composed of hundreds of small-diameter pipes in parallel, connected in the middle by welds. During the installation of the heating surface, the number of pipe welds is as high as 40,000 to 80,000 welds. Before each weld is connected, the inside and outside of the pipe ports on both sides need to be ground to ensure the quality of the welds. There are also tens of thousands of small steam and water pipes, and the number of welds is as high as 20,000. In order to ensure the cleanliness control of the small pipe installation, the traditional practice is to insert water-soluble paper into the pipe when grinding. Since the grinding must ensure that the pipe mouth is exposed within 10-15mm without foreign matter, the water-soluble paper is difficult to remove after being inserted. Most of the water-soluble paper remains in the pipe, and is cleaned by subsequent water pressure, acid washing, alkali washing, pipe blowing and other stages after dissolution in water.

[0003] However, leaving water-soluble paper in the pipeline has a great disadvantage and can easily cause hidden dangers in the operation of boilers and steam turbines. Since some of the iron filings, rust and other debris generated in the ground joints of the pipeline adhere to the water-soluble paper, if the water-soluble paper is not removed, it will become hardened in a humid external environment. During the wind pressure test, the water-soluble paper will accumulate in one place, especially at the throttle hole. Even if most of the paper is dissolved in water, the hardened debris accumulated in one place will directly affect the flow of fluid during the operation of the boiler, causing local high-temperature pipe bursts. This type of pipe burst has occurred many times in the early stages of the operation of newly built boilers.

[0004] Therefore, in view of the drawbacks of the use of water-soluble paper in the prior art for pipe ground joints, which makes it difficult to clean the pipe after welding and is prone to safety accidents, technical personnel in this field need a pipe opening sealing device that is simple in structure, easy to use, can seal the pipe inside the pipe, and is easy to remove. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a sealing structure used in an extruded expansion pipe, so as to solve the drawbacks caused by using water-soluble paper to seal the pipe opening in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the novel use is: an embedded anti-foreign object device for use at a pipe opening, comprising a sealing material, a clamping structure, and a pressing structure, the clamping structure comprising an upper clamp, a lower clamp, an upper clamp hole, and a lower clamp hole, the upper clamp hole is arranged through the upper clamp, the lower clamp hole is arranged through the lower clamp, the upper clamp hole and the lower clamp hole are arranged coaxially, the sealing material is arranged between the upper clamp and the lower clamp, the pressing structure presses the upper clamp and the lower clamp toward each other, and the sealing material bulges toward the edges of the upper clamp and the lower clamp under the pressure of the upper clamp and the lower clamp and accumulates on the inner wall of the pipe.

[0007] The above-mentioned embedded anti-foreign object device for the pipe opening, the clamping structure includes a clamping screw, a pressure plate, and an adjusting nut. The pressure plate is arranged on the upper part of the clamping screw, and the adjusting nut is arranged below the lower clamp. The outer diameter of the pressure plate is larger than the inner diameter of the upper clamp hole, and the outer diameter of the adjusting nut is larger than the inner diameter of the lower clamp hole. The clamping screw passes through the upper clamp hole and the lower clamp hole in sequence and is screwed into the adjusting nut. When the clamping screw is rotated, the pressure plate and the adjusting nut produce an extrusion effect on the upper clamp and the lower clamp.

[0008] The above-mentioned embedded anti-foreign-object device for the pipeline opening also includes an adjustment ring and an adjustment hook. The adjustment ring is fixed above the pressing screw, and the adjustment hook penetrates into the adjustment ring.

[0009] The above-mentioned embedded anti-foreign object device for the pipe opening, the lower clamp includes a flat plate and an inclined plate, the lower clamp hole is arranged at the central position of the flat plate, the inclined plate is arranged at the periphery of the flat plate, a clamp angle is arranged between the inclined plate and the flat plate, the inclined plate is inclined toward the upper clamp, the outer edge of the inclined plate is the same shape as the inner wall of the pipe, and the outer diameter of the lower clamp is not larger than the inner diameter of the pipe.

[0010] The above-mentioned embedded foreign body prevention device for the pipe opening has the same structure and shape as the upper clamping piece and the lower clamping piece.

[0011] The above-mentioned embedded anti-foreign-object device for the pipe opening, the sealing material is a rubber pad or wool felt or sponge.

[0012] The above-mentioned embedded foreign body protection device for the pipeline opening has an upper surface of the upper clamping piece provided with an adhesive layer.

[0013] The above-mentioned embedded anti-foreign object device for the pipe opening, the adjusting hook includes a hook body, a hook rod, a hook handle, and a traction rope, the hook rod connects the hook body and the hook handle, the hook body is inserted into the adjusting ring, and the traction rope is tied to the hook handle.

[0014] The utility model has the beneficial effects of an embedded anti-foreign-object device for the opening of a pipeline: the device has a simple structure, is easy to carry, easy to count, and quick to assemble and disassemble, which solves the problem of using water-soluble paper for grinding small-diameter pipelines, greatly reduces the use of water-soluble paper, ensures the cleanliness of the equipment, improves the construction quality, and ensures the safe operation of power station units. The utility model can be promoted and used in the process of grinding small-diameter pipelines in steam turbines, boilers, and electric heating construction of various types of power station units. By placing a sealing material between the upper clamp and the lower clamp, and using the cooperation of the clamping screw, the pressure plate, and the adjusting nut in the clamping structure to squeeze the upper and lower clamps, the sealing material bulges outward from the upper and lower clamps and comes into close contact with the inner diameter of the pipeline. The friction force generated is used to fix the position of the upper and lower clamps in the pipeline to prevent foreign objects from entering during the process of cleaning the pipeline opening. By using an adjusting hook and a traction rope, it is possible to prevent the device from being taken out of the pipeline as a whole in time when it is out of hand. By setting the inclined plate and adhesive layer facing the pipe mouth, the waste residue at the grinding mouth can be quickly collected and gathered to prevent the waste residue from falling when the device is taken out. And through the structure of the upper and lower clamps, the device can be in contact with the pipe to avoid the overturning of the device during the removal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation and use structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the lower clamping piece structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the adjusting hook of the utility model.

[0019] Explanation of the reference numerals: clamping structure 10, upper clamp 11, lower clamp 12, flat plate 13, inclined plate 14, clamp angle 15, lower clamp hole 16, clamping structure 20, clamping screw 21, pressure plate 22, adjusting nut 23, adjusting ring 24, sealing material 30, adjusting hook 40, hook body 41, hook rod 42, hook handle 43, pipe 50. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is described below in conjunction with specific implementation methods and drawings.

[0021] Example 1

[0022] like Figure 1-3As shown, an embedded anti-foreign object device for a pipe opening includes a clamping structure 10, a pressing structure 20, and a sealing material 30. The sealing material is placed in the middle of the clamping structure. The pressing structure squeezes the clamping structure, so that the sealing material placed in the middle of the clamping structure bulges outward and against the inner wall structure of the pipe 50, thereby increasing the friction between the sealing material and the inner wall of the pipe, and fixing the position of the entire device.

[0023] The shape of the pipe is not limited to round or square, and is usually round. If it is other shapes, the shape of the clamping structure is adjusted according to actual conditions.

[0024] The clamping structure includes an upper clamp 11, a lower clamp 12, an upper clamp hole, and a lower clamp hole 16. The upper clamp hole is set through the upper clamp, and the lower clamp hole is set through the lower clamp. The upper clamp hole and the lower clamp hole are coaxially arranged, and the upper clamp and the lower clamp have the same structure and shape. The lower clamp includes a flat plate 13 and an inclined plate 14. The lower clamp hole is arranged at the central position of the flat plate, and the inclined plate is arranged at the periphery of the flat plate. A clamp angle 15 is arranged between the inclined plate and the flat plate, and the inclined plate is inclined toward the upper clamp direction. The outer edge of the inclined plate has the same shape as the inner wall of the pipe, and the outer diameter of the lower clamp is not greater than the inner diameter of the pipe.

[0025] The sealing material includes but is not limited to one or a combination of rubber pads, wool felt, sponges and other elastic materials that can be deformed when squeezed. The sealing material is arranged between the upper clip and the lower clip. Under the squeezing of the upper clip and the lower clip, the sealing material bulges toward the edges of the upper clip and the lower clip and accumulates on the inner wall of the pipe.

[0026] The clamping structure includes a clamping screw 21, a pressure plate 22, and an adjusting nut 23. The pressure plate is arranged on the upper part of the clamping screw, and the adjusting nut is arranged below the lower clamp. The outer diameter of the pressure plate is larger than the inner diameter of the upper clamp hole, and the outer diameter of the adjusting nut is larger than the inner diameter of the lower clamp hole. The clamping screw passes through the upper clamp hole and the lower clamp hole in turn and is screwed into the adjusting nut. When the clamping screw is rotated, the pressure plate and the adjusting nut exert an extrusion effect on the upper clamp and the lower clamp.

[0027] Example 2

[0028] The similarities between this embodiment and embodiment 1 are not repeated here, and the difference lies in that:

[0029] In order to facilitate the placement or removal of the pipeline as a whole, the device also includes an adjusting ring 24 and an adjusting hook 40. The adjusting ring is fixed above the tightening screw, and the adjusting hook is inserted into the adjusting ring. The adjusting hook includes a hook body 41, a hook rod 42, a hook handle 43, and a traction rope. The hook rod connects the hook body and the hook handle, the hook body is inserted into the adjusting ring, and the traction rope is tied to the hook handle.

[0030] By using the adjusting ring and the adjusting hook, the hook handle can be rotated on the outside of the pipe mouth, thereby prompting the adjusting ring to drive the tightening screw to rotate, which is used to adjust the distance between the upper clamp and the lower clamp. By using the traction rope, the device can be pulled out in time if it falls into the pipe during use.

[0031] Example 3

[0032] The differences between this embodiment and the above embodiment will not be described in detail. The differences are as follows:

[0033] An adhesive layer is provided on the upper surface of the upper clamping piece. By using the adhesive layer, waste residues in the pipeline can be adhered and fixed, so that when the device is taken out, the waste residues fall into the pipeline.

[0034] Example 4

[0035] The differences between this embodiment and the above embodiment will not be described in detail. The differences are as follows:

[0036] For circular pipes, the upper and lower clamps are made of 1mm thick stainless steel sheets. The upper and lower clamps are concentric circles with a 4mm through hole at the center.

[0037] The seals are made of wool felt, rubber pads, sponges and other seals, and a 4mm through hole is set at the center of the circle.

[0038] The hook is made of 1mm stainless steel wire.

[0039] The clamping screw is a stainless steel fisheye lifting eye screw with a nominal diameter of 3mm.

[0040] An annular pressing plate is arranged in the upper area of ​​the compression screw, and an adjusting nut is arranged in the lower area. The upper clamping piece, the lower clamping piece and the sealing material can be fastened by the pressing plate and the adjusting nut.

[0041] The diameters d1 and d2 of the upper ends of the upper clamping piece and the lower clamping piece are smaller than the inner diameter D1 of the applicable small pipe by 0.5 mm, and the radius d3 of the upper end of the sealing material is equal to the inner diameter D1 of the applicable small pipe.

[0042] In the process of grinding the small pipe, a corresponding set of devices is selected according to the pipe diameter, and the devices are combined, that is, the sealing material is placed between the upper clamp and the lower clamp, and the compression screw with a ring is inserted through the through holes of the upper clamp, the sealing material, and the lower clamp, and fastened with a pressing plate and an adjusting nut. Before the pipe is ground, the device is placed in the small pipe, and after the grinding, the device is taken out with a hook, and the iron filings, rust, etc. generated by the grinding are cleaned, the pipe is sealed, and the next pipe is ground.

[0043] The above-mentioned device for preventing foreign matter from entering is used to solve the problem of using water-soluble paper for grinding the small-diameter pipes during the installation of the boiler heating surface, thereby greatly reducing the use of water-soluble paper, ensuring the internal cleanliness of the heating surface equipment, improving the construction quality, and ensuring the safe operation of the boiler.

[0044] The terms "upper", "lower", "outer side", "inner side" and the like (if any) in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position without giving qualitative description. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An embedded foreign body prevention device for a pipe opening, characterized in that: It includes sealing material, clamping structure and pressing structure, the clamping structure includes an upper clamp, a lower clamp, an upper clamp hole and a lower clamp hole, the upper clamp hole is set through the upper clamp, the lower clamp hole is set through the lower clamp, the upper clamp hole and the lower clamp hole are set coaxially, the sealing material is set between the upper clamp and the lower clamp, the pressing structure presses the upper clamp and the lower clamp towards each other, and the sealing material bulges toward the edges of the upper clamp and the lower clamp under the pressure of the upper clamp and the lower clamp and accumulates on the inner wall of the pipe.

2. The embedded foreign body prevention device for pipe opening according to claim 1, characterized in that: The clamping structure includes a clamping screw, a pressure plate, and an adjusting nut. The pressure plate is arranged on the upper part of the clamping screw, and the adjusting nut is arranged below the lower clamp. The outer diameter of the pressure plate is larger than the inner diameter of the upper clamp hole, and the outer diameter of the adjusting nut is larger than the inner diameter of the lower clamp hole. The clamping screw passes through the upper clamp hole and the lower clamp hole in sequence and is screwed into the adjusting nut. When the clamping screw is rotated, the pressure plate and the adjusting nut exert an extrusion effect on the upper clamp and the lower clamp.

3. The embedded foreign body prevention device for pipe opening according to claim 2, characterized in that: It also includes an adjusting ring and an adjusting hook. The adjusting ring is fixed above the pressing screw, and the adjusting hook penetrates into the adjusting ring.

4. The embedded foreign body prevention device for a pipe opening according to any one of claims 1 to 3, characterized in that: The lower clamp includes a flat plate and an inclined plate, the lower clamp hole is arranged at the central position of the flat plate, the inclined plate is arranged at the periphery of the flat plate, a clamp angle is arranged between the inclined plate and the flat plate, the inclined plate is inclined toward the upper clamp, the outer edge of the inclined plate is the same shape as the inner wall of the pipe, and the outer diameter of the lower clamp is not greater than the inner diameter of the pipe.

5. The embedded foreign body prevention device for a pipe opening according to claim 4, characterized in that: The upper clamping piece and the lower clamping piece have the same structure and shape.

6. The embedded foreign body prevention device for pipe opening according to claim 5, characterized in that: The sealing material is a rubber pad, wool felt or sponge.

7. The embedded foreign body prevention device for a pipe opening according to claim 6 is characterized in that: The upper surface of the upper clip is provided with an adhesive layer.

8. The embedded foreign body prevention device for a pipe opening according to claim 3 is characterized in that: The adjusting hook comprises a hook body, a hook rod, a hook handle and a traction rope, the hook rod connects the hook body and the hook handle, the hook body is inserted into the adjusting ring, and the traction rope is tied to the hook handle.

Images