Novel automatic discharging device of drawing equipment

Abstract

The utility model relates to the technical field of oil pipe lining pipe drawing equipment, in particular to a novel automatic discharging device of drawing equipment, which comprises a sleeve which is a hollow cylindrical sleeve, and a plurality of holes are uniformly formed in the side wall of the sleeve; the expansion teeth are matched with the open holes, a plurality of tooth-shaped objects are arranged on one sides of the expansion teeth, and after the expansion teeth are placed in the strip-shaped holes, the tooth-shaped objects are located on the outer side of the sleeve; the air bag is arranged in the sleeve and is matched with the expansion teeth; the valve is used for inflating and deflating the air bag; and the drawing mechanism is fixedly connected with the sleeve. According to the scheme, the problems that the drawing device needs to be manually taken out from the lining pipe during discharging, and time and labor are wasted are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pipe inner liner drawing equipment, in particular to a novel automatic unloading device for drawing equipment. Background Art

[0002] In order to improve the corrosion resistance of the oil pipe, a liner made of high-density polyethylene or ultra-high molecular weight polyethylene is usually added to the inner wall of the oil pipe. The commonly used manufacturing process for combining the liner and the oil pipe is: first heat and soften the liner inserted in the oil pipe, and then cool and shape the two ends of the liner through the flanging process, and finally achieve the purpose of fixing and bonding the liner and the oil pipe together. As the working time of the oil pipe increases underground, the liner fixed in the oil pipe will gradually corrode and age. After long-term use in high-angle wells and horizontal wells, eccentric wear, bulging, and edge stripping will occur. At this time, a new liner needs to be replaced. However, when combining the liner and the oil pipe, in order to ensure that the liner will not fall off from the oil pipe, the liner and the oil pipe are usually combined very tightly, which makes it extremely difficult to pull the liner out of the oil pipe manually. Therefore, the entire oil pipe is usually replaced, and the replaced oil pipe can only be scrapped, causing great waste.

[0003] To this end, a liner pipe drawing device with application number CN210939068U includes: a sleeve, which is a hollow cylindrical structure, and a plurality of strip holes are evenly arranged on the wall surface of the sleeve in the circumferential direction; an expansion tooth, which is a strip as a whole and is adapted to the shape and size of the strip holes on the sleeve, and a plurality of teeth are arranged at intervals on one side of the expansion tooth, and after the expansion tooth is placed in the strip hole, the teeth face outward; an inclined cone, which is penetrated in the sleeve and can move axially along the sleeve; in the process of drawing the liner pipe, the axial movement of the inclined cone squeezes the expansion tooth to move outward, the expansion tooth penetrates into the liner pipe and pulls the liner pipe out of the oil pipeline during the drawing process.

[0004] The above scheme assembles the sleeve, expansion tooth, inclined cone and traction part together by drawing, then inserts the assembled pulling device into the inner liner to be drawn, hangs the traction rope at the elbow of the traction part, and finally starts the traction machine to pull out the old inner liner, effectively solving the problem that traditional manual pulling is time-consuming, labor-intensive and ineffective. However, in this scheme, the expansion tooth is pushed out by pulling the inclined cone and then pulled. After the old liner is taken out of the oil pipe, it is necessary to manually knock the elbow of the traction part in the opposite direction to separate the expansion tooth and the inner liner, which is troublesome to operate. Utility Model Content

[0005] The purpose of this scheme is to provide a new type of automatic unloading device for pulling equipment to solve the problem that after the existing pulling device pulls the liner pipe out of the oil pipe, it is necessary to manually unload the pulling device from the liner pipe, which is cumbersome to operate.

[0006] In order to achieve the above purpose, this scheme provides a new type of automatic unloading device for drawing equipment, including:

[0007] Sleeve: The sleeve is a cylindrical sleeve with a hollow interior, and a plurality of openings are evenly formed on the side wall of the sleeve;

[0008] Expansion tooth: The expansion tooth matches the opening, and a plurality of teeth are provided on one side of the expansion tooth. After the expansion tooth is placed in the strip hole, the teeth are located outside the sleeve;

[0009] Also includes:

[0010] Airbag: The airbag is arranged inside the sleeve and cooperates with the expansion tooth;

[0011] Valve: The valve is used to inflate and deflate the airbag;

[0012] Pulling mechanism: The pulling mechanism is fixedly connected to the sleeve.

[0013] The principle of this scheme is that when the airbag is not inflated, the airbag is in a flattened state, at which time the expansion tooth is in a relaxed state and is located as a whole inside the sleeve. When in use, the sleeve is placed in the inner liner of the oil pipe, and then the airbag is inflated through the valve to expand it. At this time, the expansion tooth moves toward the outside of the sleeve under the squeezing of the airbag, and the tooth reaches the outside of the sleeve through the opening and fits tightly to the inner liner. Then, the sleeve is pulled by a pulling mechanism, and the inner liner and the sleeve are pulled out of the oil pipe together. Then, the airbag is deflated through the valve, and the squeezing effect of the airbag on the expansion tooth disappears, and the expansion tooth no longer fits tightly to the inner liner. At this time, the sleeve can be easily taken out of the inner liner.

[0014] The technical effect of this solution is that: this solution changes the position of the expansion tooth in the sleeve by inflating and deflating the airbag. When in use, it only needs to control the opening and closing of the valve, and no manual operation is required. It is simple and convenient.

[0015] Furthermore, the pulling mechanism includes a mounting platform, the sleeve slides on the mounting platform, a capstan is fixedly arranged at one end of the mounting platform, a steel wire rope is wound around the capstan, and a motor for driving the capstan to rotate is also arranged on the capstan, and the free end of the steel wire rope is fixedly connected to the sleeve. Before pulling, the motor is turned on to drive the capstan to rotate so that the sleeve moves into the oil pipe, and the steel wire rope stretches at this time; when pulling, the motor is turned on to drive the capstan to rotate in the opposite direction to retract the steel wire rope, and the steel wire rope drives the sleeve to be pulled out from the oil pipe.

[0016] Furthermore, a traveling trolley is placed on the mounting platform, a slide is installed on the traveling trolley, and the sleeve is fixed on the slide and slides on the mounting platform through the traveling trolley.

[0017] Furthermore, a protective shell is fixedly arranged on the mounting platform, and the steel wire rope is located inside the protective shell. Since the inner liner pipe is tightly combined with the oil pipe, the steel wire rope is subjected to a large force when the sleeve is pulled out, and is easy to be broken. If it is not protected, the steel wire rope is easy to break and fly away when it breaks, causing injuries to people. Covering the protective shell on the outside of the steel wire rope can effectively prevent the steel wire rope from breaking and flying away when it breaks.

[0018] Furthermore, the sharp corner of the tooth is in the shape of an arc. When the traditional sharp corner of the tooth contacts the liner, it is easy to dig into the inner liner due to its extremely small contact surface, causing the liner to be broken. The arc-shaped tooth can increase the contact area between the two, thereby avoiding the situation where the liner is broken.

[0019] Furthermore, the number of the openings and expansion teeth is 6. In the prior art, the number of expansion teeth is 4. In this solution, by increasing the number of expansion teeth, the contact area between the expansion teeth and the liner tube can be increased, thereby reducing the risk of the liner tube being broken during the drawing process.

[0020] Furthermore, the number of teeth on each expansion tooth is 8. In the prior art, the number of teeth is 6. In this solution, by increasing the number of teeth, the contact area between the teeth and the liner tube can be increased, thereby reducing the risk of the liner tube being broken during the drawing process.

[0021] Furthermore, the arc angle of the sharp angle portion of the arc-shaped tooth is 155°. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the external structure of the sleeve of an embodiment of the utility model;

[0024] Figure 3 This is a schematic structural diagram of an expansion tooth according to an embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the sleeve according to an embodiment of the utility model. DETAILED DESCRIPTION

[0026] The following is a further detailed description through specific implementation methods:

[0027] The figure marks in the drawings of the specification include: 1. sleeve; 2. expansion tooth; 21. tooth; 3. motor; 4. winch; 5. wire rope; 6. protective shell; 7. traveling trolley; 8. oil pipe; 9. airbag.

[0028] The embodiment is basically as shown in the attached Figure 1 As shown:

[0029] A new type of automatic unloading device for pulling equipment includes a mounting platform, one side of the mounting platform is fixed with a mounting column by bolts, a winch 4 is sleeved on the mounting column and can rotate around the mounting column, a motor 3 for driving the winch 4 to rotate is also installed on the mounting column, a steel wire rope 5 is wound around the winch 4, the free end of the steel wire rope 5 is fixedly connected to a sleeve 1, a traveling trolley 7 is placed on the mounting platform, a slide is installed on the traveling trolley 7, the end of the sleeve 1 is fixed to the slide by bolts, the sleeve 1 can slide on the mounting platform through the traveling trolley 7, in order to prevent the steel wire rope 5 from breaking during the pulling process and causing personal injury, a protective shell 6 is fixed on the mounting platform by bolts, the protective shell 6 and the mounting platform form a hollow cavity without a cover at both ends, for details, please refer to the hollow crawler box structure of the excavator, the part of the steel wire rope 5 extending out of the cable drum is located inside the protective shell 6, and an oil pipe 8 fixing frame is installed next to the mounting platform so that the oil pipe 8 corresponds to the sleeve 1.

[0030] As attached Figure 2 and attached Figure 4 The sleeve 1 is a cylindrical structure with a hollow interior, an opening at the bottom, and 6 long strip openings are evenly opened on its side wall. Six expansion teeth 2 are placed inside the sleeve 1. The specific expansion teeth 2 are a strip and are matched with the shape and size of the strip holes on the sleeve 1. During the specific installation, a limit device can be used to limit it to prevent it from deflecting. An air bag 9 is still arranged inside the sleeve 1, and an air inlet is arranged on the air bag 9. The air inlet is connected to the air tank through a pipeline, and a valve is installed on the pipeline for inflating or deflating the air bag 9. The free end of the wire rope 5 is welded to the sleeve 1; as shown in the attached Figure 3 , a tooth-like object 21 is provided on one side of the expansion tooth 2. After the expansion tooth 2 is placed in the strip hole, the tooth-like object 21 is located outside the sleeve 1. To prevent the liner pipe from being broken during the drawing process, the sharp corner of the tooth-like object 21 is arc-shaped, and its arc is 155°.

[0031] When in use, the oil pipe 8 is placed on the fixed frame, the motor 3 is turned on to drive the winch 4 to rotate so that the sleeve 1 moves into the oil pipe 8, and the traveling trolley 7 drives the sleeve 1 to move in the direction of the oil pipe 8. At this time, the wire rope 5 is extended, and the sleeve 1 enters the oil pipe 8. Then the valve is opened to inflate the airbag 9 to make it expand. At this time, the expansion tooth 2 moves toward the outside of the sleeve 1 under the extrusion of the airbag 9, and the tooth 21 reaches the outside of the sleeve 1 through the opening and fits tightly with the inner liner. Then the motor 3 is turned on again to drive the winch 4 to rotate in the opposite direction to retract the wire rope 5. At the same time, the traveling trolley 7 drives the sleeve 1 to move away from the oil pipe 8. The wire rope 5 drives the sleeve 1 to be pulled out from the inside of the oil pipe 8, and the inner liner and the sleeve 1 are pulled out of the oil pipe 8 together. Then the airbag 9 is deflated through the valve, and the extrusion effect of the airbag 9 on the expansion tooth 2 disappears, and the expansion tooth 2 is no longer tightly fitted with the inner liner. At this time, the sleeve 1 can be easily taken out of the inner liner.

[0032] The above are only embodiments of the utility model, and the utility model is not limited to the fields involved in this implementation case. The common sense such as the known specific structure and characteristics in the scheme is not described too much here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before the date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A new type of automatic unloading device for drawing equipment, comprising: Sleeve (1): the sleeve (1) is a cylindrical sleeve (1) with a hollow interior, and a plurality of openings are evenly formed on the side wall of the sleeve (1); Expansion tooth (2): the expansion tooth (2) matches the opening, and a plurality of teeth (21) are provided on one side of the expansion tooth (2). After the expansion tooth (2) is placed in the strip-shaped hole, the teeth (21) are located outside the sleeve (1); It is characterized by further comprising: Airbag (9): the airbag (9) is arranged inside the sleeve (1) and cooperates with the expansion tooth (2); Valve: The valve is used to inflate and deflate the airbag (9); Pulling mechanism: the pulling mechanism is fixedly connected to the sleeve (1).

2. According to claim 1, a new type of automatic unloading device for drawing equipment is characterized in that: The pulling mechanism comprises a mounting platform, the sleeve (1) slides on the mounting platform, a capstan (4) is fixedly arranged at one end of the mounting platform, a steel wire rope (5) is wound around the capstan (4), and the capstan (4) is also provided with a motor (3) for driving the capstan (4) to rotate, and the free end of the steel wire rope (5) is fixedly connected to the sleeve (1).

3. According to claim 2, a new type of automatic unloading device for drawing equipment is characterized in that: A traveling trolley (7) is placed on the mounting table, a slide table is mounted on the traveling trolley (7), and the sleeve (1) is fixed on the slide table and slides on the mounting table through the traveling trolley (7).

4. According to claim 2, a new type of automatic unloading device for drawing equipment is characterized in that: A protective shell (6) is fixedly arranged on the mounting platform, and the steel wire rope (5) is located inside the protective shell (6).

5. According to claim 1, a new type of automatic unloading device for drawing equipment is characterized in that: The sharp corner portion of the tooth (21) is in the shape of an arc.

6. The novel automatic unloading device for drawing equipment according to claim 1 is characterized in that: The number of the openings and expansion teeth (2) is 6.

7. The new automatic unloading device for drawing equipment according to claim 1 is characterized in that: The number of teeth (21) on each expansion tooth (2) is eight.

8. The new automatic unloading device for drawing equipment according to claim 5 is characterized in that: The arc angle of the sharp angle portion of the arc-shaped tooth (21) is 155°.

Images