Novel ceramic liner structure of internal clamp

Abstract

The utility model is applicable to the technical field of pipeline processing, and provides a novel internal aligning device ceramic gasket structure which comprises a jacking shaft, the top end of the jacking shaft is fixedly connected with a jacking claw, the bottom end of the jacking claw is transversely and fixedly connected with a base, and a center hole is vertically formed in the upper surface of the right side of the base in a penetrating mode. An annular spiral groove is vertically formed in the position, located outside the center hole, of the upper surface of the base, and the bottom end of the center hole expands outwards to form a limiting groove. According to the novel ceramic gasket structure of the internal aligning device, by arranging the extending base, the connecting plate and the ceramic gasket, ceramic is used as a material of the supporting welding plate, the ceramic gasket structure is resistant to high temperature and abrasion and not stuck to a pipe opening, the problem of copper infiltration when the internal aligning device with a copper lining is used for welding a pipeline can be effectively solved, and the ceramic gasket mounting structure of the ceramic gasket structure is simple and convenient to use. And a new ceramic pad is more convenient and rapid to disassemble and replace, and the efficiency of the replacement process can be improved, so that the pipeline machining efficiency is indirectly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline processing, and in particular relates to a novel ceramic liner structure of an inner aligner. Background Art

[0002] When welding steel pipes for pipeline laying, due to surface welding, molten iron and flux solution can easily leak into the inner wall to form crystals, affecting the smoothness of the inner wall. At the same time, welding spatter pollutes the inner wall of the pipeline. Usually, workers need to enter the pipeline to remove crystals, polish, remove spatter and other pollutants. The working environment is harsh and the labor intensity is high, which seriously affects the speed of pipeline laying and restricts the economic benefits of engineering construction.

[0003] In order to solve the above problems, our company has specially developed an internal jointer with a weld protection device. That is, N copper liners with outer arcs equal to the inner wall of the pipe are used to close the inner annular seam of the steel pipe to completely seal the inner annular seam, so that molten iron, welding flux crystals and splashes cannot penetrate into the inner cavity of the steel pipe during drag welding. However, it was found that the conventional copper liners had the problem of copper infiltration in the welds during use. This patent changes the copper liners to ceramic liners. Ceramics have the advantages of high temperature resistance, wear resistance, and non-stick pipe mouth. The use of ceramic liners requires low groove processing accuracy, and the back weld is full, strong and beautiful. It is also easy to separate the welding liners and the materials after welding, which can improve labor efficiency, improve welding quality and reduce welding costs. The pressed alumina ceramics have various excellent properties, but have a fatal weakness - high brittleness, low impact resistance and easy to break. However, its low price is far beyond the reach of other materials (ceramic liners are about 25 yuan per piece, and one piece can be used 2 to 3 times; copper liners are about 780 yuan per piece, and one piece can be used 20 to 30 times.) The cost of welding the same number of pipe nozzles is reduced by half compared to copper liners, and the problem of copper infiltration is also solved. However, the material properties of ceramics determine that if the weld protection device of the adapter is changed from a copper pad to a ceramic liner, the problem of lossless fixation and rapid replacement must first be solved. Therefore, despite its absolute price advantage, its use in the field of pipeline welding is still in the experimental stage and has not been vigorously promoted. The ceramic liner structure of the inner adapter described in this patent is mainly aimed at the requirement of rapid replacement and assembly required by the construction site, and is an improvement on the structure of the original copper pad assembly.

[0004] Ceramic liners and copper weighing pads are both weld protection devices, and their structures and working principles are similar. The main structure is to install a weld protection device on an ordinary internal jointer, that is, to fix the ceramic liner assembly on the front row of expansion claws, and when the front row of expansion claws are lifted up, they are also lifted up accordingly. Finally, N blocks are seamlessly spliced ​​to cover the entire circumference of the weld on the inner wall of the steel pipe. During welding, the upper arc is close to the inner annular seam of the steel pipe to completely seal the inner annular seam, so that molten iron, welding flux crystals and splashes cannot penetrate into the inner cavity of the steel pipe during drag welding, and at the same time, the formation of weld nodules and burrs is avoided, ensuring that the inner wall of the pipe is smooth and clean and the inside of the pipe is clean.

[0005] The new type of internal aligner ceramic pad structure described in this patent has the same working principle and overall structure as the previous patent "a new type of internal aligner copper pad structure". This patent basically has all the structures and features of the previous patent. The difference lies in the material of the weld protection support plate and the fixing method of the support plate and the connecting plate. The main highlight of this patent is the fixing method of the connecting plate and the ceramic pad. The outer side is L-shaped clamping type, without other auxiliary fasteners, and the inner side uses a torsion spring flip structure. The card plate is designed in a groove shape for easy handholding. A reserved hole is processed in the middle of the card plate groove. A special wrench can be inserted into the hole and a little force can be used to rotate the card plate around the pin shaft. After quickly replacing the ceramic pad, loosen the wrench, and the card plate can automatically reset and press the ceramic pad by the torsion spring. Utility Model Content

[0006] The utility model provides a novel ceramic liner structure for an inner butt jointer, aiming to solve the problem that when steel pipes are butt-welded in pipeline laying, molten iron and flux solution easily leak into the inner wall to form crystals due to surface welding, affecting the smoothness of the inner wall, and welding spatters pollute the inner wall of the conveying pipeline.

[0007] The utility model is implemented as follows: a novel ceramic liner structure of an inner joint device comprises a lifting shaft, the top end of the lifting shaft is fixedly connected with a lifting claw, the bottom end of the lifting claw is laterally fixedly connected with a base, a center hole is vertically opened on the upper surface of the right side of the base, an annular spiral groove is vertically opened on the upper surface of the base and located outside the center hole, and the bottom end of the center hole is expanded outward to form a limit groove;

[0008] A fixed shaft is vertically arranged inside the center hole, and the fixed shaft passes through the center hole on the right side of the base from bottom to top. The bottom end of the fixed shaft expands outward to form a limit block adapted to the limit groove. A spring is sleeved on the outer surface of the fixed shaft, and the bottom end of the spring is fixedly connected to the inside of the spiral groove. A cushion structure is arranged on the top of the spring.

[0009] Preferably, the cushion structure includes a connecting plate detachably mounted on the top end of the fixed shaft, a piece protrudes from the outer side of the connecting plate to form an L-shaped stopper, a notch is milled on the inner side of the connecting plate and a pin hole is processed, a pin shaft is transversely arranged inside the pin hole, a clamping plate is fixedly connected to the outer surface of the pin shaft, two torsion springs are sleeved on the outer surface of the pin shaft, and a ceramic pad is detachably mounted on the top end of the connecting plate through the stopper and the clamping plate.

[0010] Preferably, a top screw hole is provided transversely through the middle of the inner surface of the connecting plate, and a top screw is connected to the inner thread of the top screw hole.

[0011] Preferably, one side rotating arm of the two torsion springs is horizontally placed on the outer surface of the clamping plate, and the other side rotating arms of the two torsion springs are vertically inserted into the groove of the connecting plate.

[0012] Preferably, the jacking claw is fixed to the upper end of the jacking shaft by means of a flat washer, a bolt and a flat key.

[0013] Preferably, the base is fixed to the lower surface of the lifting claw by four base fixing bolts.

[0014] Beneficial Effects

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model is a novel ceramic liner structure of the inner jointer, which is provided with a base, a connecting plate and a ceramic pad. The device uses ceramic as the material of the support welding plate, which is resistant to high temperature, wear and non-stick to the pipe mouth, and can effectively solve the problem of copper infiltration when welding pipes with the inner jointer with a copper liner. Ceramics are fragile and inconvenient to process, so one-piece pressing and molding is selected, and no secondary processing such as drilling, hinges, milling key slots, etc. is required. The connection method of clamping on both sides solves the problem that ceramics are fragile and difficult to fix, and the torsion spring structure is cleverly used to solve the problem of fast replacement of ceramic pads required for on-site use. The upper rotating arm of the torsion spring is fixed on the special stop of the card plate, which forms the phenomenon that the card plate rotates around the center of the torsion spring. Once the card plate starts to rotate around the center of the spring, the spring quickly pulls the other components back to their original positions, which will form a rotational force, and change the generated rotational force into the required resistance. In this way, the torsion spring can fix the ceramic pad in a static manner by storing or releasing this energy to achieve the desired result. In addition, replacing the copper pad with a ceramic pad can greatly reduce the construction cost. The cost of welding the same number of pipe openings is reduced by at least half compared to the cost of a copper pad. At the same time, the ceramic pad installation structure of the device is relatively simple, and it is more convenient and quick to disassemble and replace the new ceramic pad, which can improve the efficiency of the replacement process, thereby indirectly improving the efficiency of pipeline processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a side cross-sectional structural schematic diagram of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the utility model when viewed from above.

[0019] In the figure: 1-lifting shaft, 2-lifting claw, 3-flat washer, 4-bolt, 5-base, 6-ceramic washer, 7-clip plate, 8-connecting plate, 9-torsion spring, 10-lifting screw, 11-pin shaft, 12-fixing shaft, 13-spring, 14-fixing bolt, 15-flat key. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] See also Figure 1-3 The utility model provides a technical solution: a novel ceramic liner structure of an inner joint device, comprising a lifting shaft 1, a lifting claw 2 is fixedly connected to the top of the lifting shaft 1, a base 5 is laterally fixedly connected to the bottom end of the lifting claw 2, a center hole is vertically penetrated through the upper surface of the right side of the base 5, an annular spiral groove is vertically opened on the upper surface of the base 5 and outside the center hole, and the bottom end of the center hole is expanded outward to form a limit groove;

[0022] A fixed shaft 12 is vertically arranged inside the center hole. The fixed shaft 12 passes through the center hole on the right side of the base 5 from bottom to top. The bottom end of the fixed shaft 12 expands outward to form a limit block that matches the limit groove. A spring 13 is sleeved on the outer surface of the fixed shaft 12. The bottom end of the spring 13 is fixedly connected to the inside of the spiral groove, and a cushion structure is arranged on the top of the spring 13.

[0023] The pad structure includes a connecting plate 8 which is detachably mounted on the top end of a fixed shaft 12. A piece protrudes from the outer side of the connecting plate 8 to form an L-shaped stopper. A notch is milled on the inner side of the connecting plate 8 and a pin hole is processed. A pin shaft 11 is horizontally arranged inside the pin hole. A clamping plate 7 is fixedly connected to the outer surface of the pin shaft 11. Two torsion springs 9 are sleeved on the outer surface of the pin shaft 11. A ceramic pad 6 is detachably mounted on the top end of the connecting plate 8 through the stopper and the clamping plate 7.

[0024] A jackscrew hole is formed transversely through the middle of the inner surface of the connecting plate 8 , and a jackscrew 10 is connected to the inner thread of the jackscrew hole.

[0025] In this embodiment, when the device is in use, the device is installed between the front and rear tensioning mechanisms of the pipe joint device, and the ceramic pad 6 of the device is installed on the expansion claw of the pipe joint device. There are as many groups of ceramic pads 6 as there are expansion claws in a single row, and multiple groups of ceramic pads 6 are evenly distributed in a circular shape. The arc diameter of the upper arc surface of the ceramic pad 6 is exactly the same as the inner diameter of the pipe. When the expansion claw is lifted, multiple ceramic pads 6 fit together without gaps to form a complete circle that just covers the pipe joint, perfectly isolating the space inside and outside the weld, so that molten iron and flux solution cannot penetrate into the pipe joint. Both ends of each ceramic pad 6 are 45° inclined surfaces. When the expansion claw falls back, the circumference formed by multiple ceramic pads 6 shrinks, and the ceramic pads 6 are forced to stagger a certain angle along the inclined surface to reach the retracted state.

[0026] When the top screw 10 is screwed into the top screw hole, the pin 11 can be limited to prevent its movement from affecting the normal use of the device.

[0027] One side arm of the two torsion springs 9 is horizontally placed on the outer surface of the card plate 7, and the other side arm of the two torsion springs 9 is vertically inserted into the groove of the connecting plate 8. When the card plate 7 is opened outward, the torsion spring 9 rotates around the pin 11 with the card plate 7. At this time, the torsion spring 9 stores energy and forms a rotational force. When the card plate 7 is released, the torsion spring 9 can quickly pull the card plate 7 back to its original position, which will form a rotational force and change the generated rotational force into the required resistance. In this way, the torsion spring 9 can fix the ceramic pad 6 in a static manner by storing or releasing this energy, achieving the desired result.

[0028] Furthermore, the jacking claw 2 is fixed to the upper end of the jacking shaft 1 through a flat washer 3 , a bolt 4 and a flat key 15 .

[0029] The base 5 is fixed to the lower surface of the jacking claw 2 by four base fixing bolts 14 .

[0030] In this embodiment, the above is the installation structure of the lifting claw 2 and the base 5, which has no specific effect and will not be described here.

[0031] The working principle and use process of the utility model: After the utility model is installed, the device uses ceramic as the material of the welding plate, which is resistant to high temperature, wear and non-stick to the pipe mouth, and can effectively solve the problem of copper seepage when welding pipes using a copper-lined inner butt welder, and the ceramic pad 6 of the device has a relatively simple installation structure, which is more convenient and quick to disassemble and replace with a new ceramic pad 6, which can improve the efficiency of the replacement process, thereby indirectly improving the efficiency of pipeline processing.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of ceramic liner structure for the inner mouthpiece, Features: The lifting shaft (1) comprises a lifting claw (2) fixedly connected to the top of the lifting shaft (1), a base (5) fixedly connected to the bottom of the lifting claw (2) in a transverse direction, a center hole vertically penetrating the upper surface of the right side of the base (5), an annular spiral groove vertically opened on the upper surface of the base (5) and located outside the center hole, and the bottom end of the center hole expands outward to form a limit groove; A fixed shaft (12) is vertically arranged inside the central hole, and the fixed shaft (12) passes through the central hole on the right side of the base (5) from bottom to top. The bottom end of the fixed shaft (12) expands outward to form a limit block that matches the limit groove. The outer surface of the fixed shaft (12) is sleeved with a spring (13), and the bottom end of the spring (13) is fixedly connected to the inside of the spiral groove. The top end of the spring (13) is provided with a cushion structure.

2. A novel ceramic liner structure for an inner mouthpiece as claimed in claim 1, Features: The cushion structure comprises a connecting plate (8) detachably mounted on the top end of the fixed shaft (12); a piece protrudes from the outer side of the connecting plate (8) to form an L-shaped stopper; a notch is milled on the inner side of the connecting plate (8) and a pin hole is processed; a pin shaft (11) is transversely arranged inside the pin hole; a clamping plate (7) is fixedly connected to the outer surface of the pin shaft (11); two torsion springs (9) are sleeved on the outer surface of the pin shaft (11); and a ceramic pad (6) is detachably mounted on the top end of the connecting plate (8) through the stopper and the clamping plate (7).

3. A novel ceramic liner structure for an inner mouthpiece as claimed in claim 2, Features: A top screw hole is formed in the middle of the inner surface of the connection plate (8) and is formed transversely therethrough. A top screw (10) is connected to the inner thread of the top screw hole.

4. A novel ceramic liner structure for an inner mouthpiece as claimed in claim 2, Features: One side rotating arm of the two torsion springs (9) is horizontally placed on the outer surface of the clamping plate (7), and the other side rotating arm of the two torsion springs (9) is vertically inserted into the groove of the connecting plate (8).

5. A novel ceramic liner structure for an inner mouthpiece as claimed in claim 1, Features: The jacking claw (2) is fixed to the upper end of the jacking shaft (1) via a flat washer (3), a bolt (4) and a flat key (15).

6. A novel ceramic liner structure for an inner mouthpiece as claimed in claim 1, Features: The base (5) is fixed to the lower surface of the lifting claw (2) via four base fixing bolts (14).

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