CN201217106Y - Polyethylene tube scale cinder shredders - Google Patents

Abstract

The utility model relates to a scraping device for removing an oxide layer on the outer surface of a pipe fitting at one time, and aims to provide a polyethylene pipe oxide skin scraper for scraping off the oxide layer on the surface of a pipe fitting more conveniently, quickly and efficiently. The polyethylene pipe oxide skin scraper includes a cutter; it is characterized in that it also includes a bottom frame and a fixed frame; wherein: the fixed frame includes a section of arc groove, the fixed frame is detachably fixedly connected with the bottom frame, and the bottom frame is set Tool, the direction of the cutting edge of the tool is parallel to the axial direction of the arc groove. The polyethylene pipe scale scraper of the utility model has the following advantages: the tool and the pipe surface are in line contact, and can scrape the oxide scale on the pipe surface evenly and efficiently; the scraping depth can be adjusted by adjusting the screw-in depth of the fastening bolt, and the worker only The oxide skin of the pipe can be easily scraped by rotating the wrench; the quality of the pipe fitting surface after scraping can be effectively controlled; the structure is simple, easy to manufacture, and has practicability.

Description

Polyethylene pipe scale scraper

technical field

The utility model relates to a skin scraping device for removing the oxidized layer on the outer surface of the pipe fitting end at one time. More specifically, the utility model relates to a scraper for scraping the oxide layer on the outer surface of polyethylene pipe fittings during the electrofusion welding process of PE pipes.

Background technique

Electrofusion connection is one of the most commonly used connection methods for polyethylene pipes. During the welding process, the existence of an oxide layer on the outer surface of the pipe will seriously hinder the diffusion of polyethylene polymer chains during the welding process, thereby greatly reducing the strength of the welded joint. Therefore, before electrofusion welding, the oxide skin in the welding zone on the surface of the pipe must be scraped off.

At present, in the application of PE pipe electric fusion welding engineering, flat scrapers are generally used to manually scrape off the oxide layer of pipe fittings, which is time-consuming, laborious, inefficient and cannot guarantee the quality. Since the blade of the flat scraper is basically in point contact with the outer wall of the pipe, a large number of scratches of different depths will appear on the surface of the pipe after scraping off the oxide layer, which will easily cause welding defects in the electrofusion welded joint, thus affecting the joint. Performance; In addition, in the process of using a flat scraper to remove the oxide layer on the outer surface of the pipe fittings, there will often be a problem that the pipe fittings are not round after scraping, which will seriously affect the quality of the welded joints. According to statistics, when a worker is working normally, it takes about 10 minutes to scrape off the oxide layer on the surface of a PE pipe with a diameter of 160mm, and the surface quality after scraping cannot be guaranteed. There is no report on the development of related equipment at home and abroad.

Flat scrapers are generally expensive and the blades are easy to be damaged and rusted. In actual engineering applications, some operators directly use edged stones, knives, or porcelain fragments to scrape off the oxide layer of pipe fittings. Although the cost is saved, more waste is wasted. It takes a lot of time and manpower, and it is difficult to control the surface quality of the scraped pipe fittings.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a more convenient, efficient, high-quality polyethylene pipe oxide skin scraper for scraping off the oxide layer on the surface of pipe fittings.

The utility model is achieved through the following technical solutions:

A polyethylene pipe oxide skin scraper, including a cutter; it is characterized in that it also includes a bottom frame and a fixed frame; wherein: the fixed frame includes a section of arc groove, the fixed frame and the bottom frame are detachably fixedly connected, and the bottom frame Set the tool so that the direction of the cutting edge of the tool is parallel to the axial direction of the arc groove.

As an improvement, one end of the fixed frame is connected to the bottom frame through a straight plate; the other end is connected to the bottom frame through a short shaft.

As a further improvement, the bottom frame includes two beams arranged in parallel, and the cutter is arranged between the beams.

As a further improvement, a wrench is provided at one end of the bottom frame.

As a further improvement, a through hole is provided at the end of the straight plate, and the straight plate is screwed to the bottom frame.

As a further improvement, the short shaft is integrated with the fixing frame, and the outer end is a threaded structure, and is installed with the through hole on the bottom frame through a nut.

As a further improvement, threaded holes are provided on the bottom frame, and the bottom frame is connected with the through holes on the straight plate through fixing bolts.

Compared with the prior art, the utility model has significant advantages over the traditional scraper tool both in terms of the surface quality of the pipe after scraping and in the operation of the scraper:

1. Improved scraping efficiency: In the past, the contact between the scraper and the pipe fittings of the scraper device is point contact, and only one line can be scraped off each time. The cutter of this scraper is in line contact with the surface of the pipe, which can scrape the pipe evenly and efficiently Oxide skin on the surface;

2. Reduce the labor intensity of the scraper: In the past, the scraper had to press the scraper hard on the surface of the pipe to scrape to meet the requirements of the scraping depth of the oxide skin. The scraping depth of this scraper can be adjusted by adjusting the screw-in depth of the fastening bolt , workers can easily scrape off the scale of the pipe by simply rotating the wrench;

3. The structure is simple, easy to manufacture and practical;

4. It can effectively control the quality of the pipe fitting surface after scraping.

Description of drawings

Fig. 1: the schematic diagram of the front view of the structure of the specific embodiment of the utility model;

Fig. 2: the right view diagram of the structure of the specific embodiment of the utility model;

Figure 3: a schematic view of the structure in a specific embodiment of the present invention;

Figure 4: a schematic diagram of a three-dimensional structure in a specific embodiment of the utility model;

Figure 5: a schematic diagram of the connection between the straight plate and the underframe in the specific embodiment of the utility model;

Figure 6: A schematic diagram of the connection between the short shaft and the chassis in the specific embodiment of the utility model.

Among the figure 1-fixed frame, 2-short shaft, 3-wrench, 4-underframe, 5-cutter.

Detailed ways

With reference to accompanying drawing, the utility model will be described in detail below.

A polyethylene pipe oxide skin scraper, including a cutter 5; also includes a bottom frame 4, a fixed frame 1; A cutter 5 is arranged on the frame 4, and the blade direction of the cutter 5 is parallel to the axial direction of the arc groove.

One end of the fixed frame 1 is connected to the underframe 4 through a straight plate; the other end is connected to the underframe 4 through a short shaft 2; the underframe 4 includes two parallel beams, and the cutter 5 is arranged between the beams; one end of the underframe 4 A wrench 3 is provided; a through hole is provided at the end of the straight plate, and the straight plate is threadedly connected with the bottom frame 4; the short shaft 2 and the fixed frame 1 are integrally structured, and the outer end is a threaded structure, and the through hole on the bottom frame 4 is installed through a nut; Offer threaded holes on the bottom frame 4, and the bottom frame 4 is connected with the through hole on the straight plate by fixing bolts.

In order to further illustrate the use process of the structure of the utility model, the specific scraping process of the utility model is now described as follows:

The diameter of the circular arc groove of the fixed frame 1 is set to be larger than the diameter of the pipe material, and the pipe material is straightly loaded into the fixed frame 1, and the surface of the pipe material and the arc groove part of the fixed frame 1 are firmly attached. When the fixed frame 1 is fastened, its straight plate and the bottom frame 4 The crossbeam overlaps, the through hole on the straight plate of the fixed frame 1 and the threaded hole on the crossbeam of the bottom frame 4 are connected by fastening bolts, tighten the fastening bolts, and observe the distance between the blade of the cutter 5 and the surface of the pipe, and wait until the blade starts to cut into the pipe Stop tightening when surface. After the pipe is fixed, hold the pipe with one hand to prevent it from rotating, and rotate the wrench 3 with the other hand to make the knife 5 scrape off the oxide skin on the surface of the pipe. The degree of compression of the fixing frame 1 is controlled by adjusting the screw-in depth of the fastening bolts, thereby adjusting the tight fit relationship between the surface of the pipe and the cutter 5 due to the diameter deviation of the pipe, and the scraping depth of the oxide skin on the surface of the pipe.

Finally, it should be noted that the above-mentioned examples are only specific embodiments of the present invention. Apparently, the utility model is not limited to the above embodiments, and many variations are possible. All deformations that a person skilled in the art can derive or associate directly from the content disclosed in the utility model shall be considered as the protection scope of the utility model.

Claims (7)

1. A polyethylene pipe oxide skin scraper, including a cutter; it is characterized in that it also includes a bottom frame and a fixed frame; wherein: the fixed frame includes a section of arc groove, the fixed frame and the bottom frame are detachably fixedly connected, and the bottom frame A tool is arranged on the frame, and the direction of the cutting edge of the tool is parallel to the axial direction of the arc groove. 2. The polyethylene pipe scale scraper according to claim 1, wherein one end of the fixing frame is connected to the bottom frame through a straight plate; the other end is connected to the bottom frame through a short shaft. 3. The oxide scale scraper for polyethylene pipes according to claim 1, wherein the bottom frame comprises two beams arranged in parallel, and the cutter is arranged between the beams. 4. The polyethylene pipe scale scraper according to claim 1, wherein a wrench is provided at one end of the bottom frame. 5. The oxide scale scraper for polyethylene pipes according to claim 2, wherein a through hole is opened at the end of the straight plate, and the straight plate is screwed to the bottom frame. 6. The polyethylene pipe scale scraper according to claim 2, characterized in that the short shaft and the fixing frame are integrally structured, and the outer end is a threaded structure, and is installed with the through hole on the bottom frame through a nut. 7. The oxide skin scraper for polyethylene pipes according to claim 1 or 5, characterized in that threaded holes are provided on the bottom frame, and the bottom frame is connected with the through holes on the straight plate through fixing bolts.

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