Novel leather cup pipe cleaner

Abstract

The utility model relates to the technical field of pipe cleaners, in particular to a novel leather cup pipe cleaner. Comprising a steel frame, first fixing plates are fixed to the two ends of the steel frame, two second fixing plates are fixed to the outer side of the steel frame, a plurality of screws are evenly distributed on the inner sides of the first fixing plate and the second fixing plate located at the same end in a threaded connection mode, one ends of the outer sides of the screws are in threaded connection with a straight plate, and the inner side of the straight plate is tightly attached to the steel frame. A first partition plate is in threaded connection with the outer sides of the screws and located at one end of the straight plate. According to the novel leather cup pipe cleaner, the supporting mechanism has certain elasticity, when the outer side of the arc-shaped leather cup is abraded and a gap between the arc-shaped leather cup and the inner wall of a pipeline is increased, the supporting mechanism can compensate the gap through elastic deformation of the supporting mechanism, and therefore close contact between the arc-shaped leather cup and the inner wall of the pipeline is kept; and through the design of the clamping mechanism, the supporting mechanism is more convenient to mount and dismount, and maintenance and overhaul of the supporting mechanism are more facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to pig technology field especially relates to a novel leather cup pig. BACKGROUND

[0002] In the construction and development of oil and gas industry, oil and gas pipeline is an important engineering construction content, the impurities remaining in the pipeline can cause the pipeline inner diameter to reduce, reduce the conveying efficiency, and bring the security risk to the pipeline, so in a certain period, the pig is used to clean the conveying pipeline once. In the pigging operation, the leather cup pig relies on the close contact between the leather cup and the inner wall of the pipeline to remove the dirt and impurities in the pipeline. When the leather cup is worn and the gap between the leather cup and the inner wall of the pipeline increases, the cleaning effect of the leather cup on the inner wall of the pipeline is weakened, and the pigging effect is reduced.

[0003] For example, the utility model (CN216175001U) discloses a leather cup pig, which comprises two rigid skeletons, a traction rod connected between the two rigid skeletons, two left leather cups and two right leather cups mounted on the two rigid skeletons through end covers respectively, one end cover on the right side of the two end covers is fixedly connected with the traction rod, a fixed ring is fixedly connected with the traction rod, a sliding ring is slidingly connected with the traction rod, a spring is connected between the fixed ring and the sliding ring, a plurality of installation grooves are formed at equal angles on the side wall of the traction rod, a cutter is rotatably connected in each installation groove, a traction column is fixedly connected with the right end of the sliding ring through a plurality of connecting rods, a traction ring is fixedly connected with the right end of the traction column, and a scraping brush assembly and a driving assembly matched with the hanging brush assembly are mounted on the right side of the two rigid skeletons.

[0004] When the above technology is used, it is found that the existing technology has the following technical problems: the above leather cup is worn after a long time of use, the fitting effect of the leather cup with the inner wall of the pipeline is poor, the cleaning effect of the leather cup on the inner wall of the pipeline is weakened, and the pigging effect is reduced. Therefore, we design a new leather cup pig to provide another technical solution for the above technical problems. CONTENT OF THE UTILITY MODEL

[0005] Therefore, it is necessary to provide a new leather cup pig to solve the above technical problems. The supporting mechanism has a certain elasticity. When the outer side of the arc-shaped leather cup is worn and the gap between the arc-shaped leather cup and the inner wall of the pipeline increases, the supporting mechanism can compensate for the gap by elastic deformation, so as to maintain the close contact between the arc-shaped leather cup and the inner wall of the pipeline. Through the design of the clamping mechanism, the installation and disassembly of the supporting mechanism are more convenient, and the maintenance and overhaul of the supporting mechanism are more convenient.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides a new pig of leather cup, including steel frame, both ends of steel frame are fixed with first fixed plate, the outside of steel frame is fixed with two second fixed plate, and the inboard of first fixed plate and second fixed plate at same end are uniformly connected with a plurality of screw, and one straight board is connected with the one end of the outside of a plurality of screw, and the inboard of straight board is closely combined with steel frame, and one first baffle is connected with the one end of the outside of a plurality of screw and located straight board, and the inboard of first baffle is closely combined with steel frame, and two arc leather cups are arranged in one end of first baffle, and arc leather cup is connected with screw, and the inboard of arc leather cup is closely combined with steel frame, and one second baffle is arranged in one end of arc leather cup, and the inboard of second baffle is closely combined with steel frame, and second baffle is connected with screw, and a plurality of support mechanisms are arranged on second baffle, and support mechanism is used for the support of arc leather cup, and a plurality of third fixed plates are fixed on the outside of second baffle, and clamping mechanism is arranged on third fixed plate, and the inboard of third fixed plate is provided with first connecting column, and clamping mechanism is used for the clamping of third fixed plate and first connecting column.

[0008] As a preferred embodiment of the novel pig of leather cup provided by the utility model, the support mechanism includes first connecting column, second connecting column, sliding plate, guide rod, spring, first connecting plate, second connecting plate and third connecting plate, both ends of first connecting column are fixed with second connecting column, the outside of second connecting column is slidably connected with sliding plate, the inboard of both sides of two sliding plates is slidably connected with guide rod, two guide rods are fixedly connected with two second connecting columns, the outside of second connecting column is sleeved with spring, one end of spring is fixed with second connecting column, the other end of spring is fixedly connected with sliding plate, the outside of top of sliding plate is rotatably connected with first connecting plate, the inboard of top of first connecting plate is rotatably connected with second connecting plate, the top of two second connecting plates is fixed with one third connecting plate, and the top of third connecting plate is fixed with the top of inboard of arc leather cup.

[0009] As a preferred implementation form of the novel pig with leather bowl, the clamping mechanism comprises a first rotating stick, a threaded rod, a first bevel gear, a second bevel gear, a second rotating stick and a clamping block, the inner side of the third fixed plate is rotationally connected with the first rotating stick, the threaded rod is fixed to the two ends of the first rotating stick, the threaded rod is rotationally connected with the third fixed plate, the screw rotation directions of the two threaded rods are opposite, the outer side of the first rotating stick is fixed with the first bevel gear, the first bevel gear is located in the interior of the third fixed plate, the first bevel gear is meshingly connected with the second bevel gear on one side, the second bevel gear is fixed with the second rotating stick on one side, the second rotating stick is rotationally connected with the third fixed plate, the outer sides of the two threaded rods are both threadedly connected with the clamping block, the two clamping blocks are both slidingly connected with the third fixed plate, and the clamping block is clamped with the first connecting column.

[0010] As a preferred implementation form of the novel pig with leather bowl, the outermost layer of the arc-shaped leather bowl is a wear-resistant layer, the middle layer of the arc-shaped leather bowl is an elastic layer, and the inner side of the arc-shaped leather bowl is a reinforcing layer, and the wear-resistant layer and the elastic layer and the elastic layer and the reinforcing layer are adhered through an adhesive layer.

[0011] As a preferred implementation form of the novel pig with leather bowl, one end of the first fixed plate is fixed with a traction ring.

[0012] As a preferred implementation form of the novel pig with leather bowl, the outer surfaces of the steel frame, the first fixed plate and the second fixed plate are sprayed with anticorrosive paint.

[0013] It can be seen without doubt that the above technical solutions of the present application can certainly solve the technical problems to be solved by the present application.

[0014] Meanwhile, through the above technical solutions, the novel pig with leather bowl has at least the following beneficial effects:

[0015] The novel pig with leather bowl has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0018] Figure 2 It is a schematic diagram of the connection structure of the steel frame and the second fixed plate of the present application.

[0019] Figure 3 It is a schematic diagram of the position of the arc-shaped skin bowl and the second partition plate of the present application.

[0020] Figure 4 It is a schematic diagram of the connection structure of the sliding plate and the first connecting plate of the present application.

[0021] Figure 5 It is a schematic diagram of the connection structure of the threaded rod and the clamping block of the present application.

[0022] Figure 6 It is an enlarged schematic diagram of A of the present application. Figure 5

[0023] Figure 7 It is a schematic diagram of the structure of the arc-shaped skin bowl of the present application.

[0024] In the figure: 1, steel frame; 2, first fixed plate; 3, second fixed plate; 4, screw; 5, straight plate; 6, first partition plate; 7, arc-shaped skin bowl; 8, second partition plate; 9, third fixed plate; 10, first connecting column; 11, second connecting column; 12, sliding plate; 13, guide rod; 14, spring; 15, first connecting plate; 16, second connecting plate; 17, third connecting plate; 18, first rotating stick; 19, threaded rod; 20, first bevel gear; 21, second bevel gear; 22, second rotating stick; 23, clamping block; 24, wear-resistant layer; 25, adhesive layer; 26, elastic layer; 27, reinforcing layer; 28, traction ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0026] ​As described in the background, the skin bowl is worn out after a long time of use, and the fit with the inner wall of the pipeline is poor, the cleaning effect of the skin bowl on the inner wall of the pipeline is weakened, and the pipe cleaning effect is reduced.

[0027] In order to solve the technical problem, the utility model provides a novel skin bowl pig.

[0028] Specifically, please refer to Figures 1-7 A novel skin bowl pig specifically comprises: a steel frame 1, both ends of the steel frame 1 are fixed with first fixed plates 2, the outer side of the steel frame 1 is fixed with two second fixed plates 3, the inner sides of the first fixed plates 2 and the second fixed plates 3 at the same end are evenly connected with a plurality of screws 4, one straight plate 5 is threadedly connected to one end of the outer side of the plurality of screws 4, the inner side of the straight plate 5 is closely attached to the steel frame 1, one first partition plate 6 is threadedly connected to one end of the outer side of the plurality of screws 4 and located at one end of the straight plate 5, the inner side of the first partition plate 6 is closely attached to the steel frame 1, two arc-shaped skin bowls 7 are arranged at one end of the first partition plate 6, the arc-shaped skin bowls 7 are threadedly connected with the screws 4, the inner sides of the arc-shaped skin bowls 7 are closely attached to the steel frame 1, a second partition plate 8 is arranged at one end of the arc-shaped skin bowls 7, the inner side of the second partition plate 8 is closely attached to the steel frame 1, the second partition plate 8 is threadedly connected with the screws 4, a plurality of supporting mechanisms are evenly arranged on the second partition plate 8, the supporting mechanisms are used for supporting the arc-shaped skin bowls 7, a plurality of third fixed plates 9 are evenly fixed on the outer side of the second partition plate 8, clamping mechanisms are arranged on the third fixed plates 9, first connecting columns 10 are arranged on the inner sides of the third fixed plates 9, and the clamping mechanisms are used for clamping the third fixed plates 9 and the first connecting columns 10.

[0029] The novel skin bowl pig provided by the utility model, the supporting mechanism has a certain elasticity, when the outer side of the arc-shaped skin bowl 7 is worn out to cause the gap with the inner wall of the pipeline to increase, the supporting mechanism can compensate for the gap by elastic deformation, so that the arc-shaped skin bowl 7 is kept in close contact with the inner wall of the pipeline, and the installation and dismounting of the supporting mechanism are more convenient through the design of the clamping mechanism, and the maintenance and overhaul of the supporting mechanism are more favorable.

[0030] It should be noted that the embodiments in the utility model and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0031] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0032] Embodiment one

[0033] Referring to Figures 1-4The utility model provides a new type of leather cup pigging, including steel frame 1, the length of steel frame 1 is 1.5 to 2 times of steel frame 1 diameter, and the both ends of steel frame 1 are fixed with first fixed plate 2, and the outer side of steel frame 1 is fixed with two second fixed plate 3, and the inner side of first fixed plate 2 and second fixed plate 3 at the same end are uniformly connected with multiple screws 4, and one straight plate 5 is connected with the outer side of multiple screws 4 one end, and the inner side of straight plate 5 is closely combined with steel frame 1, and one first baffle 6 is connected with the outer side of multiple screws 4 one end located straight plate 5, and the inner side of first baffle 6 is closely combined with steel frame 1, and two arc leather cups 7 are arranged in one end of first baffle 6, and the interference amount of arc leather cup 7 is generally 3 to 4 percent of pipeline diameter, and arc leather cup 7 is connected with screw 4, and the inner side of arc leather cup 7 is closely combined with steel frame 1, and one second baffle 8 is arranged in one end of arc leather cup 7, and the inner side of second baffle 8 is closely combined with steel frame 1, and second baffle 8 is connected with screw 4, and multiple support mechanisms are uniformly arranged on second baffle 8, and support mechanism is used for the support of arc leather cup 7, and multiple third fixed plate 9 are fixed on the outer side of second baffle 8, and clamping mechanism is arranged on third fixed plate 9, and the inner side of third fixed plate 9 is provided with first connecting column 10, and clamping mechanism is used for the clamping of third fixed plate 9 and first connecting column 10.

[0034] Support mechanism includes first connecting column 10, second connecting column 11, sliding plate 12, guide rod 13, spring 14, first connecting plate 15, second connecting plate 16 and third connecting plate 17, and the both ends of first connecting column 10 are fixed with second connecting column 11, and the outer side of second connecting column 11 is slidably connected with sliding plate 12, and the inner side of both sides of two sliding plates 12 is slidably connected with guide rod 13, and two guide rods 13 are fixedly connected with two second connecting columns 11, and spring 14 is sleeved with the outer side of second connecting column 11, and one end of spring 14 is fixed with second connecting column 11, and the other end of spring 14 is fixedly connected with sliding plate 12, and the outer side of the top of sliding plate 12 is rotatably connected with first connecting plate 15, and the inner side of the top of first connecting plate 15 is rotatably connected with second connecting plate 16, and the top of two second connecting plates 16 is fixed with one third connecting plate 17, and the top of third connecting plate 17 is fixed with the top of the inner side of arc leather cup 7;

[0035] Support mechanism has certain elasticity, when the gap between arc leather cup 7 and pipeline inner wall increases due to the wear of the outer side of arc leather cup 7, support mechanism can compensate the gap by the elastic deformation, so as to keep the close contact between arc leather cup 7 and pipeline inner wall.

[0036] Embodiment two

[0037] Refer to Figures 5-7The novel leather cup pigging device, the clamping mechanism comprises a first rotating stick 18, a threaded rod 19, a first bevel gear 20, a second bevel gear 21, a second rotating stick 22 and a clamping block 23, the inner side of the third fixed plate 9 is rotatably connected with the first rotating stick 18, the two ends of the first rotating stick 18 are fixedly connected with the threaded rods 19, the threaded rods 19 are rotatably connected with the third fixed plate 9, the screw rotation directions of the two threaded rods 19 are opposite, the outer side of the first rotating stick 18 is fixedly connected with the first bevel gear 20, the first bevel gear 20 is located in the interior of the third fixed plate 9, one side of the first bevel gear 20 is meshedly connected with the second bevel gear 21, one side of the second bevel gear 21 is fixedly connected with the second rotating stick 22, the second rotating stick 22 is rotatably connected with the third fixed plate 9, the outer sides of the two threaded rods 19 are threadedly connected with the clamping blocks 23, the two clamping blocks 23 are slidably connected with the third fixed plate 9, and the clamping blocks 23 are clamped with the first connecting column 10.

[0038] The clamping mechanism is designed to make the installation and dismounting of the supporting mechanism more convenient and more conducive to the maintenance and overhaul of the supporting mechanism.

[0039] The outermost layer of the arc-shaped leather cup 7 is a wear-resistant layer 24, the material of the wear-resistant layer 24 is fluorine rubber, the fluorine rubber is wear-resistant and chemical corrosion-resistant, the middle layer of the arc-shaped leather cup 7 is an elastic layer 26, the elastic layer 26 is a rubber material with good elasticity, and the elastic layer 26 plays a role in buffering and dispersing pressure, the inner side of the arc-shaped leather cup 7 is a reinforcing layer 27, the reinforcing layer 27 is a metal wire mesh, and the reinforcing layer 27 is used for improving the overall strength and pressure resistance of the leather cup, the wear-resistant layer 24 and the elastic layer 26 are adhered through an adhesive layer 25, the elastic layer 26 and the reinforcing layer 27 are adhered through the adhesive layer 25, the material of the adhesive layer 25 is a polytetrafluoroethylene-based adhesive, the adhesive layer 25 can maintain stable adhesion performance under extreme conditions, and meanwhile, excellent physical and chemical properties are provided.

[0040] One end of a first fixed plate 2 is fixedly connected with a traction ring 28, the traction ring 28 is arranged to help balance the running stability of the pigging device in the pipeline, the outer surfaces of the steel frame 1, the first fixed plate 2 and the second fixed plate 3 are sprayed with anticorrosive paint, and the spraying of the anticorrosive paint is conducive to prolonging the service life of the steel frame 1, the first fixed plate 2 and the second fixed plate 3.

[0041] The use process of the novel pig bowl pig launcher provided by the utility model is as follows: when the pig launcher is assembled, the straight plate 5 is picked up, the mounting hole thereof is aligned with the screw 4 having passed through the straight plate 5, then the straight plate 5 is gently sleeved, the straight plate 5 is attached to the corresponding mounting position of the steel frame 1, then the straight plate 5 is correctly placed at the mounting position, the arc-shaped leather bowl 7 is installed, when the second partition plate 8 is installed, the first connecting column 10 is inserted into the inner side of the third fixed plate 9, then the second rotating stick 22 is rotated through the hexagonal wrench, since the second rotating stick 22 is fixedly connected with the second bevel gear 21, the rotation of the second rotating stick 22 drives the rotation of the second bevel gear 21, since the second bevel gear 21 is meshingly connected with the first bevel gear 20, the rotation of the second bevel gear 21 drives the rotation of the first bevel gear 20, since the first bevel gear 20 is fixedly connected with the first rotating stick 18, the rotation of the first bevel gear 20 drives the rotation of the first rotating stick 18, since the first rotating stick 18 is fixedly connected with the threaded rod 19, the rotation of the first rotating stick 18 drives the rotation of the threaded rod 19, so that the clamping block 23 screw-connected with the threaded rod 19 moves, since the screw rotation directions of the two threaded rods 19 are opposite, the two clamping blocks 23 move away from each other, so that the clamping block 23 is clamped with the first connecting column 10, thereby the first connecting column 10 is fixedly connected to the inner side of the third fixed plate 9, then the arc-shaped leather bowl 7 and the second partition plate 8 are sequentially installed, then the nut is screwed, thereby the straight plate 5, the first partition plate 6, the arc-shaped leather bowl 7 and the second partition plate 8 are sequentially installed on the steel frame 1;

[0042] Since the pig launcher leather bowl is in interference fit with the pipeline, when the pig launcher is inserted into the pipeline, the arc-shaped leather bowl 7 is extruded by the inner wall of the pipeline, at this time, since the third connecting plate 17 is tightly attached to the top end of the inner side of the arc-shaped leather bowl 7, when the arc-shaped leather bowl 7 is compressed, the third connecting plate 17 also moves, since the third connecting plate 17 is rotationally connected with the second connecting plate 16 and the second connecting plate 16 is rotationally connected with the first connecting plate 15, the movement of the third connecting plate 17 drives the rotation of the first connecting plate 15, so that the sliding plate 12 rotationally connected with the first connecting plate 15 moves on the outer side of the second connecting column 11, so that the spring 14 fixedly connected with the sliding plate 12 and sleeved on the outer side of the second connecting column 11 is compressed;

[0043] When the arc-shaped leather bowl 7 is abraded due to long-time use and the gap between the arc-shaped leather bowl 7 and the inner wall of the pipeline increases, the sliding plate 12 moves under the elastic force of the spring 14, since the sliding plate 12 is rotationally connected with the first connecting plate 15, the movement of the sliding plate 12 drives the movement of the first connecting plate 15, so that the movement of the first connecting plate 15 drives the movement of the third connecting plate 17 through the second connecting plate 16, since the third connecting plate 17 is fixed with the arc-shaped leather bowl 7, the spring 14 drives the third connecting plate 17, so that the arc-shaped leather bowl 7 is deformed to compensate for the gap, thereby the arc-shaped leather bowl 7 is kept in close contact with the inner wall of the pipeline.

[0044] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific implementation. Obviously, according to the content of the description, many modifications and changes can be made. The description selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the skilled in the art can well understand and use the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A new pig with a leather cup, characterized in that, The utility model provides a steel frame, the both ends of the steel frame (1) are fixed with first fixed plate (2), the outside of steel frame (1) is fixed with two second fixed plate (3), and the inside of first fixed plate (2) and second fixed plate (3) at the same end is evenly connected with a plurality of screw (4) with thread, and one straight board (5) is connected with thread on the outside of a plurality of screw (4) one end, and the inside of straight board (5) is closely combined with steel frame (1), and one first baffle (6) is connected with thread on the outside of a plurality of screw (4) and one end of straight board (5), and the inside of first baffle (6) is closely combined with steel frame (1), and two arc leather bowl (7) are arranged in one end of first baffle (6), and arc leather bowl (7) is connected with thread with screw (4), and the inside of arc leather bowl (7) is closely combined with steel frame (1), and second baffle (8) is arranged in one end of arc leather bowl (7), and the inside of second baffle (8) is closely combined with steel frame (1), and second baffle (8) is connected with thread with screw (4), and a plurality of support mechanisms are evenly arranged on second baffle (8), and the support mechanism is used for the support of arc leather bowl (7), and a plurality of third fixed plate (9) are evenly fixed on the outside of second baffle (8), and clamping mechanism is arranged on third fixed plate (9), and first connecting column (10) is arranged on the inside of third fixed plate (9), and the clamping mechanism is used for the clamping of third fixed plate (9) and first connecting column (10).

2. A pig according to claim 1, characterized in that The support mechanism includes first connecting column (10), second connecting column (11), sliding plate (12), guide rod (13), spring (14), first connecting plate (15), second connecting plate (16) and third connecting plate (17), both ends of first connecting column (10) are fixed with second connecting column (11), the outside of second connecting column (11) is slidably connected with sliding plate (12), the inner sides of both sides of two sliding plates (12) are slidably connected with guide rod (13), two guide rods (13) are fixedly connected with two second connecting columns (11), the outside of second connecting column (11) is sleeved with spring (14), one end of spring (14) is fixed with second connecting column (11), the other end of spring (14) is fixedly connected with sliding plate (12), the outside of the top of sliding plate (12) is rotatably connected with first connecting plate (15), the inner side of the top of first connecting plate (15) is rotatably connected with second connecting plate (16), the top of two second connecting plates (16) is fixed with one third connecting plate (17), and the top of third connecting plate (17) is fixed with the top of the inner side of arc leather bowl (7).

3. A pig according to claim 1, characterized in that The clamping mechanism comprises a first rotating stick (18), threaded rods (19), a first bevel gear (20), a second bevel gear (21), a second rotating stick (22) and clamping blocks (23), the inner side of the third fixed plate (9) is rotationally connected with the first rotating stick (18), both ends of the first rotating stick (18) are fixedly connected with the threaded rods (19), the threaded rods (19) are rotationally connected with the third fixed plate (9), the screw rotation directions of the two threaded rods (19) are opposite, the outer side of the first rotating stick (18) is fixedly connected with the first bevel gear (20), the first bevel gear (20) is located inside the third fixed plate (9), one side of the first bevel gear (20) is meshedly connected with the second bevel gear (21), one side of the second bevel gear (21) is fixedly connected with the second rotating stick (22), the second rotating stick (22) is rotationally connected with the third fixed plate (9), the outer sides of the two threaded rods (19) are threadedly connected with the clamping blocks (23), the two clamping blocks (23) are slidably connected with the third fixed plate (9), and the clamping blocks (23) are clamped with the first connecting column (10).

4. A pig according to claim 1, characterized in that The outermost layer of the arc-shaped leather bowl (7) is a wear-resistant layer (24), the middle layer of the arc-shaped leather bowl (7) is an elastic layer (26), and the inner side of the arc-shaped leather bowl (7) is a reinforcing layer (27); the wear-resistant layer (24) and the elastic layer (26) and the elastic layer (26) and the reinforcing layer (27) are adhered through an adhesive layer (25).

5. A pig according to claim 1, characterized in that One end of the first fixed plate (2) is fixedly connected with a traction ring (28).

6. A pig according to claim 1, characterized in that The outer surfaces of the steel frame (1), the first fixed plate (2) and the second fixed plate (3) are sprayed with anticorrosive paint.

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